Studies of Giant Magnetoimpedance (GMI) effect have attracted considerable attention considering various technological applications [1,2]. Up to now, most attention has been paid to the achievement of the highest GMI as well as to tailoring of the magnetic field dependence of GMI effect through the modification of the magnetic anisotropy of the magnetic materials. Generally, the magnetic anisotropy of amorphous materials can be controlled by the magnetostriction coefficient (that to great extend is linked to the chemical composition of material) or by special thermal treatment (including magnetic field or stress-annealing) [2,3]. Most of studies of GMI effect are performed in different families of magnetic wires [1-3]. 
Recently, a new approach allowing to tune the magnetic anisotropy of magnetic wires by depositing of magnetic and non-magnetic layers onto the glass-coating [4].
Accordingly, the purpose of this paper is to study the GMI effect in amorphous Co-rich microwires with Co- layers deposited onto glass-coating. 
Studies of magnetic properties and GMI effect of as-prepared amorphous Fe3.6Co69.2Ni1B12.5Si11Mo1.5C1.2 and of the same microwires with deposited Co-layer microwires reveals that both samples present soft magnetic properties and high GMI effect. Low field hysteresis loops of both samples are rather similar, while the contribution of Co-layer is observed in hysteresis loop measured at higher magnetic field (see Figs 1a,b). Such character of hysteresis loop is similar to those observed in microwires with mixed amorphous- crystalline structure [5]. However, the GMI ratio, ΔZ/Z and magnetic field, H, dependences of GMI effect are affected by the Co-layer (see Fig.2). In particularly, higher GMI ratio and sharper peaks on ΔZ/Z (H) dependencies. 
We discussed observed experimental dependences considering both change of the internal stresses originated by the Co-layer as well as the magnetostatic interaction between the amorphous ferromagnetic nucleus and deposited Co Layer. 
**References:** 
[1] T. Uchiyama, K. Mohri, and Sh. Nakayama, IEEE Trans. Magn., 47, No 10 (2011) pp. 3070-3073 
[2] F.Qin, H.-X. Peng, Prog.Mater. Sci,58 (2013) 183–259 
[3] A. Zhukov, et.al. J. Alloys Compound 814 (2020) 152225, 
[4] K.R. Pirota, M. Hernandez-Velez, D. Navas, A. Zhukov and M. Vázquez, Adv. Funct. Mater. 14 No 3 (2004) 266-268. 
[5] V. Zhukova, et.al. , Chemosensors, 9 (2021) 100, doi: https://doi.org/10.3390/ chemosensors9050100 

![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/fcd16c5915024c52cc375c38ac9ea4a7.png) 
Fig.1 Low field (a) and high field hysteresis loops of studied microwires 
![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/1b1cb1408a5636b26250156f0a2b3a1b.png) 
Fig.2. ΔZ/Z (H) dependencies of microwire without Co-layer (a) and with Co-layer deposited onto glass-coating (b)

Magnetic properties and giant magnetoimpedance effect in multilayered microwires

Recently, multifunctional composite materials with magnetic wire inclusions for non-destructive and non-contact stress and temperature monitoring have been proposed [1]. Therefore, studies of temperature dependence of the Giant magnetoimpedance, GMI, effect become essentially relevant. There are only very few studies on temperature dependence of GMI and most of them were performed in thick amorphous wires without glass coating and in very limited temperature range [2,3,4]. Although usually the highest GMI effect is observed in Co-rich magnetic wires, GMI effect of Fe-rich glass-coated microwires can be substantially improved by stress-annealing induced magnetic anisotropy [5]. 
GMI effect and magnetic properties under temperature influence of as-prepared and stress annealed (annealing temperature Tann= 325 oC, stress applied during the annealing σ= 190MPa) thin amorphous Fe75B9Si12C4 glass-coated microwires produced by the Taylor Ulitovsky technique are analyzed. Remarkable change in the hysteresis loops and GMI effect is observed for both samples upon heating. For as-prepared FeBSiC microwire a beneficial influence of temperature on the GMI ratio is observed and hysteresis loops change of character from almost rectangular shape to inclined one (Fig.1). On the other hand, although GMI ratio improvement after stress-annealing decreases with the temperature increasing (Fig.2), temperature dependence can be tuned by the stress annealing conditions. Additionally, almost complete reversibility of the changes induced by the temperature is observed. 
Temperature dependence of the hysteresis loops and GMI effect of studied microwires is explained considering the heating effect on the internal stresses relaxation, the modification of the thermal expansion coefficients of the metallic nucleus and the glass coating and in terms of the Hopkinson effect. 
**References:** [1] A. Allue et al., Compos. Part A Appl. Sci. and Manuf., Vol. 120, p.12 (2019). 
[2] J. Nabias, A. Asfour and J. Yonnet, IEEE Trans. Magn., Vol. 53(4), p.4001005 (2017). 
[3] J.D. Santos, R. Varga, B. Hernando and A. Zhukov, J. Magn. Magn. Mater. 321, p.3875 (2009). 
[4] M. Kurniawan et al., J. Electron. Mater., Vol. 43, p.4576 (2014). 
[5] V. Zhukova et al., Scr. Mater., Vol. 142, p.10 (2018). 

![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/4bac301404213f54c4bb4adca5d0984b.png) 
Fig.1. Hysteresis loops (a) and GMI ratio at f= 50 MHz (b) of as-prepared sample, measured at different temperature. 
![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/2cf9acf5640bce6a1403026372c49c55.png) 
Fig.2. Hysteresis loops (a) and GMI ratio at f= 50 MHz (b) of stress annealed sample at 325 oC during 15 min (applied stress σ= 190 MPa), measured at different temperature.

Effect of temperature on magnetic properties and magnetoimpedance effect in Fe rich microwires

Co2-based full-Heusler compounds are among the most promising materials due to their exotic transport properties, high thermal stability, high Curie temperatures (Tc â‰ˆ 1100 K) for the bulk sample, high magnetic moment (~ 6 ÂµB/f.u.), low Gilbert damping constant (Î± = 0.004) and large anomalous Hall effect linked with their band structure [1-3]. The Taylor-Ulitovsky technique, known since 60-s and allows fast (up to a few hundred meters per minute) preparation quite long (up to few kilometers) and thin (typically 0.5 to 40 Âµm in diameter) metallic wires coated by flexible and insulating glass coating [4]. In addition, the existence of thin, flexible, insulating, and highly transparent glass coating, enhanced mechanical properties and fast and inexpensive fabrication method, glass coating can be useful for biomedical applications due to its biocompatibility [5]. We report on preparation and magnetic properties of Co2FeSi Heusler alloy glass-covered microwires with a metallic nucleus diameter of about 4,4 Âµm and total sample diameter of about 17,6 Î¼m. From the X-ray diffraction, XRD, analysis of the as-prepared Co2FeSi, it was shown that the structure consists of a mixture of nanocrystalline and amorphous phases. An increase in the average grain size, Dg, from 17.8 to 31.6 nm and content of nanocrystalline phase, C from 52 % to 97 % upon annealing at 873 K (1 h) is obtained from XRD analysis. Estimated from temperature dependence of magnetic moment Tc is between 1040 K and 1059 K. As illustrated in Fig. 1, the Co2-based Heusler glass-coated microwires present strong dependence of the magnetization and the structural properties on the annealing conditions. For annealing temperatures between 873 K and 973 K magnetic phase transition has been observed, as evidenced by sharp drop of the magnetic moment when we applied 50 Oe and 200 Oe external magnetic fields during FC and FH and change in hysteresis loops (see Fig.1).

Preparation and magnetic properties of Co2 based Heusler alloy glass

In the last years, the railway industry has been one of the leading sectors in the research of alternatives to reduce the costs associated with maintenance. The components of railway tracks suffer huge amounts of pressure that could compromise railway safety and must be revised, repaired and renew frequently according to strict criteria. In the case of the sleeper, the maximum stress allowed by the different authorities is in the order of ∼100 MPa [1] before substitution. Currently, the main testing procedures are based on visual inspection or in situ measurements, making maintenance procedures economically inefficient. 

With the development of industry 4.0, researchers have been studying the fabrication of smart-sleepers capable of monitoring the sleeper structural stress in real-time [2]. Current technology makes extensive use of expensive optical fiber based instruments [2,3]. Thus, making it difficult to extend its use to big extensions of railway lines. 

Magnetic microwires fabricated by the Taylor-Ulitovsky technique appear in this context as an alternative for smart-sleeper technology. The microwires obtained using this technique are characterized by their small cross section (d =0 .5-40 µm), environment insulation thanks to the glass-coating and high sensitivity to external stimuli [4]. These properties, along with their cheap fabrication costs has motivated the study of this microwires for structural measurements in concrete structures similar to concrete sleepers [5]. 

In this work we show the possibility of glass coated magnetic microwires of working as railway monitorization devices. This is done by measuring the effect of longitudinal stress on the hysteresis loops of several Co- and Fe-rich microwires with different compositions. By analyzing the hysteresis loops, as shown in Fig 1 and Fig 2, we are able to obtain a calibration function that relates the coercitive field, Hc, with the applied stress over a wide applied stresses range. 
**References:** [1] Parvez A., Foster, S. J., Engineering Structures, Vol 141, p 241-250, (2017). 
[2] Jing G. et al., Construction and Building Materials, Vol 271, 121533, (2021). 
[3] Butler et al., Structural Health Monitoring, Vol 17(3), p 635-653, (2018). 
[4] Corte-Leon P. et al, Journal of Alloys and Compounds, Vol 789, p 201-208. (2019) 
[5] Olivera, J., et al (2019. Sensors, Vol 19(21), 4685 (2019) 

![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/b422981d4496bf381544640a70e25c48.png) 
Figure 1: Response of wire Fe4.39 Co65.12 Si6.79 Cr8.88 Mo0.15 to stress a) Hysteresis loop evolution. b) Microwire calibration function. 
![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/f2b3344c1519bfc3cd9db189fd16b7ef.png) 
Figure 2: Response of wire Fe66.99 Si6.45 Nb5.79 Ni1.13 upon to stress a) Hysteresis loop evolution. b) Microwire calibration function.

Effect of Applied Stresses on Magnetic Properties of Co and Fe rich Glass

Amorphous ferromagnetic glass-coated microwires are known for their excellent magnetic properties, such as magnetic softness, ultrafast magnetization switching and the giant magnetoimpedance (GMI) effect. Said properties, as well as the hysteresis loop shape and domain structure of as-prepared microwires are strongly affected by the magnetostriction constant [1]. However, these properties are prone to change after submitting the microwires to different annealing processes and/or external stimulus, and are dependent on the sample’s geometry [1,2]. The combination and manipulation of these parameters are widely studied to adapt magnetic microwires to new technological applications. 

Fe-rich microwires commonly exhibit bistable magnetic behaviour and poor GMI values. Past experiments on thin Fe microwires have shown an enhancement on their GMI effect after current annealing of samples, with hints to a change in their magnetic domain structure [3]. However, while thin microwires are promising materials for development of microsensors, thicker ones are suitable for different applications, such as stress monitoring and tuneable composite materials. Thus, a study of Fe-rich, thick microwires is carried out. 

A Fe71.8B13.27Si11.02Nb2.99Ni0.92 glass-coated microwire was produced, with metallic nucleus and total diameters d=47.9µm and D=63.2µm (ρ=d/D≈0.8). While short (12cm, same lenght as the pick-up coil used for measurement) samples show regular squared hysteresis loops, common for Fe microwires, asymmetric hysteresis loops are observed in 24cm long samples (Figure 1.a). Current annealing results in coercivity, Hc, increasing in both samples, being most noticeable for the long one (Figure 1.b). 

On the other hand, GMI measurement yields an unexpected result, as, while its current annealing results in a proportionally smaller GMI ratio, ΔZ/Z, enhancement than that obtained on thin ones, the as-prepared microwire shows much higher ΔZ/Z -values and a double peak structure, usually denoting a different domain structure (Figure 2). 
**References:** [1]: V. Zhukova, M. Churyukanova, A. Talaat, et al. Effect of stress-induced anisotropy on high frequency magnetoimpedance effect of Fe and Co-rich glass-coated microwires. J. Alloys Compound, Vol. 735, p.1818-1825 (2018). https://doi.org/10.1016/j.jallcom.2017.11.235 
[2]: V. Zhukova, J.J. del Val, L. Gonzalez-Legarreta, et al. Optimization of Soft Magnetic Properties in Nanocrystalline Fe-Rich Glass-Coated Microwires. JOM, Vol. 67, p.2108–2116 (2015). https://doi.org/10.1007/s11837-015-1546-x 
[3]: A. Gonzalez, M. Ipatov, P. Corte-Leon, et al. Effect of Joule heating on GMI and magnetic properties of Fe-rich glass-coated microwires, AIP Advances, Vol. 12, p.035021 (2022). https://doi.org/10.1063/9.0000290 

![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/be63c179803fbf03b88c5b5a57095d67.png) 
Fig.1: a) hysteresis loops of annealed samples and b) coercive field dependence on annealing times. 
![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/ec67e59dbb9667cd72f643c47aff7de0.png) 
Fig.2: GMI ratios of as-prepared and annealed a) thin and b) thick microwires.

Current Annealing Dependence of Magnetic Properties of Thick Fe rich Glass

Studies of amorphous magnetic wires have become a traditional topic of applied magnetism owing to excellent magnetic properties and the development of prospective applications [1,2]. Taylor-Ulitovsky fabrication technique provides the broadest microwires diameters range together with improved corrosion, mechanical properties and biocompatibility related to the presence of the glass-coating [2,3]. However, the latter is a source of additional magnetoelastic anisotropy, Kme, which is one of the most important factors determining the magnetic properties of the amorphous materials. 
One effective method for evaluation of magnetic anisotropy in magnetic wires is the ferromagnetic resonance, FMR [2]. Additionally, FMR allows the evaluation of several material properties as saturation magnetization, g-factor, damping parameter, etc. [2,4].
We report experimental results of FMR and magnetic properties of various Fe and Co-based glass-coated microwires. We observed that the coercivity, Hc, of Co-Fe-rich microwires depends on the chemical composition: the highest Hc is observed for the microwire with highest Fe content. Such dependence must be attributed to Fe content influence on the magnetostriction coefficient, λs [3]. 
FMR spectra presents considerable dependence on resonance field, Hr, frequency, f (Fig.1) and Kme [4]. In all studied microwires Hr increases with f. Hr is also affected by the microwire diameter: the FMR spectra for microwires with similar chemical composition, but diameter almost an order of magnitude different are shown in Fig.2. On the other hand, even for the same λs (mostly determined by the chemical composition), Kme is affected by the value of the internal stresses, σi, that it is mostly determined by the ratio ρ, between metallic nucleus diameter, d, and total microwire diameter, D [3,4]. Therefore, the difference observed in FMR spectra must be attributed not only to different d, but also to the difference in σi. Additionally, in thin enough microwires the interface layer between the glass-coating and metallic nucleus can affect the FMR behavior [3]. 
**References:** [1] M. Knobel, M. Vázquez, L. Kraus, Giant Magnetoimpedance, in Handbook of Magnetic Materials, Elsevier, Vol. 15, p497 (2003). 
[2] K. Mohri, et al., IEEE Trans. Magn., Mag-26, p.1789 (1990). 
[3] A. Zhukov et al., J. Alloys Compd., Vol. 814, p. 152225 (2020), doi:10.1016/j.jallcom.2019.1522250925-8388. 
[4] L. Kraus, Ferromagnetic resonance in individual wires: From micro- to nanowires, in Magnetic Nano- and Microwires (ed. M. Vázquez), Elsevier, ch. 15 (2015). 

![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/2a10fd15ef0f2efe3407501f33976e66.png) 
Fig.1. FMR spectra of Fe79B8Si10C3 microwire (d=19.2 μm). 
![](https://s3.eu-west-1.amazonaws.com/underline.prod/uploads/markdown_image/1/image/3569f4ed375587f77086b525a888aecc.png) 
Fig.2. FMR spectra of Fe74B13Si11C2 (d=19.2 μm) and Co2.25Fe72.75Si15B10 (d=2 μm) microwires.

Studies of FMR in amorphous glass–coated microwires

The real time non-destructive monitoring of stresses and temperature is one of the most demanded solutions in the field of sensor technologies. One of the most prospective technologies addressing this problem is a novel sensing technique for non-destructive monitoring utilizing ferromagnetic wire inclusions presenting the high frequency magnetoimpedance, MI, effect quite sensitive to tensile stress and magnetic field [1]. One of the advantages of this technology is that proposed free space microwave spectroscopy allows remote monitoring of external stimuli, like stress, magnetic field or temperature. The glass-coated microwires with typical diameters from 1 to 50 Î¼m can provide new functionalities such as improved mechanical and corrosive properties, adherence with polymeric matrices and biocompatibility [2]. In the present paper a novel sensing technique for direct non-destructive and non-contact monitoring of the composite polymerization utilizing ferromagnetic glass-coated microwire inclusions with magnetic properties sensitive to tensile stress and temperature is described. We provide in-situ studies of the evolution of the hysteresis loop of arrays consisting of Co- rich (Fe3.8Co65.4Ni1B13.8Si13Mo1.35C1.65) microwires during the composites matrix polymerization. We observed remarkable change of the hysteresis loops upon matrix polymerization: remarkable coercivity change and transformation of linear hysteresis loop into rectangular in the arrays with Co-rich microwires placed inside the matrix (see Fig.1a). Using the free space technique we observed considerable variation of the Transmission parameter of the microwires array in the range of 4-7 GHz upon the matrix polymerization (see Fig.1b). Observed dependencies are discussed considering heating during the matrix polymerization measured using a standard thermocouple (Fig.1c) and the matrix shrinkage and their influence on magnetic properties and MI effect of glass-coated microwires.

Novel Sensing Technique for Non Destructive Composites Monitoring

Magnetic wires can present outstanding magnetic properties such as giant magnetoimpedance (GMI) or magnetic bistability and related single domain wall (DW) propagation. Magnetically soft glass-coated magnetic microwires prepared by the Taylor-Ulitovsky technique with metallic nucleus covered by flexible, insulating and biocompatible glass are quite demanded for a great number of applications [1]. Recenly, we showed that stress-annealing allows magnetic softening, GMI effect improvement and even grading the magnetic anisotropy in Fe-rich microwires [2]. Although generally thinner wires present certain advantages related to the industrial application, for some applications (like non-contact stress monitoring or magnetic tags) thicker wires are highly requested. Recently, preparation of thicker (above 50 μm in diameter, d) glass-coated Fe-rich microwires is reported [3]. In this paper, we present our recent experimental results on preparation and processing of “thick” Co-rich magnetic microwires (d = 94 μm) with graded magnetic anisotropy. From previous publications related to the effect of stress-annealing on magnetic anisotropy of Fe-rich microwires, is known that the stress-annealing induced anisotropy depends on the annealing temperature, Tann [2]. Such graded magnetic anisotropy has been obtained by stress-annealing of Co-rich microwire at variable annealing temperature. The hysteresis loops for different sections of the microwire have been evaluated using a short (2 mm long) movable pick-up coil. A gradual change in the hysteresis loop (measured by the short pick-up coil) of the sample stress-annealed at variable Tann is observed (see Fig.1). Such microwire, presents also variable squareness ratio, Mr/M0, along the microwire length, L (see Fig.1). Obtained graded anisotropy has been attributed to a gradual modification of the domain structure along the microwire. Previously, for preparation of thin films with a graded magnetic anisotropy, rather sophisticated methods were used, including a change in the chemical composition during the deposition of thin films [4]. Accordingly, we propose a rather simple route to design graded magnetic anisotropy in a magnetic microwire.

![](https://assets.underline.io/uploads/markdown_image/1/image/57c8ead2c65eb757399987363b53f20c.jpg)

Graded magnetic anisotropy in Co-rich microwires

Amorphous ferromagnetic glass-coated microwires present various properties suitable for technological applications, such as great magnetic softness, ultra-fast magnetization switching and domain wall propagation, inductive heating capabilities or Giant Magnetoimpedance, GMI, effect [1, 2]. Thus, they have been widely studied in the past few years [1]. As-prepared Fe and Co based microwires differ in some of these properties. Fe microwires are observed to present magnetic bistability and rather low GMI values, while Co ones possess nearly non-hysteretic magnetization curves and higher GMI [1], making the latter a more attractive candidate for GMI related technologies. However, Co is a critical raw material, making Fe-based microwires preferable for large scale applications. Thus, search of appropriate postprocessing for magnetic softness and GMI improvement is essentially relevant. Among the prospective methods allowing these goals are stress-annealing and Joule heating. As the latter is more effective for tuning of GMI in Co-rich microwires [1], systematic studies of Joule heating on magnetic properties and GMI of Fe-rich ones are scarce. Accordingly, influence of Joule heating on magnetic properties and GMI effect of Fe75B9Si12C4 glass-coated microwires was studied. The GMI ratio, ΔZ/Z, is defined as: ΔZ/Z = [Z(H) - Z(Hmax)] / Z(Hmax) A decrease in coercivity of Joule heated samples is observed, while hysteresis loop maintain rectangular shape (Fig 1). However, a remarkable increase in ΔZ/Z is observed (Fig 2). Observed GMI ratio improvement has been discussed considering magnetic anisotropy by induced magnetic field during Joule heating and internal stress relaxation. Remarkable GMI effect improvement observed in Joule heated Fe-rich microwires, along the fact that Fe is a more common, cheap metal than Co, makes them suitable for magnetic sensor applications.

![](https://assets.underline.io/uploads/markdown_image/1/image/0c6d500e18157a87372c9dde525ab3a3.jpg)

Fig. 1. Hysteresis loops of Fe75B9Si12C4 microwires Joule heated at 20mA for different times. Inset: coercivity dependence on annealing time.

![](https://assets.underline.io/uploads/markdown_image/1/image/4f8abb050b87d288134fc3e6171b6a1e.jpg)

Fig. 2. GMI ratio of as-prepared (a) and Joule heated for 3min (b) Fe75B9Si12C4 microwires measured at different AC frequencies.

Effect of Joule Heating on GMI and Magnetic Properties of Fe-rich Glass-Coated Microwires

Magnetic wires are one of the most convenient materials allowing to study domain wall, DW, propagation. From the viewpoint of technological applications, fast, reliable, and controllable DW propagation is essential [1]. Therefore, great efforts have been made to control the single DW propagation [1]. Amorphous perfectly cylindrical microwires with positive magnetostriction coefficient can present a fast (DW velocity, v, of the order of 1 km/s) single DW propagation [2]. In viscous regime below the Walker breakdown field a uniform v is usually assumed if magnetic fielf, H is constant. We observed that in Fe75B9Si12C4 magnetic microwire stress-annealing at variable annealing temperature, T, rather different hysteresis loops for different sections of such microwire are observed (Fig. 1a). In as-prepared microwires DW propagation with the same velocity is observed in different section of the microwire (see Fig. 1b). However, in a media with graded magnetic anisotropy v is essentially non-uniform (Fig. 1c): faster DW propagation is observed in the region with moderate stress-annealing induced magnetic anisotropy (see Fig. 1c). Such character of induced anisotropy is evidenced by the dependence of the inner axially magnetized core radius, Rc. on sample length, L (see Fig. 1d). Evaluated Rc(L) dependence and its correlation with T(L) reflects graded magnetic anisotropy obtained by stress-annealing at variable Tann. Higher DW velocity in the region with induced magnetic anisotropy is explained by the transverse character of stress-annealing induced magnetic anisotropy which affects the travelling domain wall in a similar way as application of transversal bias magnetic field. Obtained graded magnetic anisotropy allows engineering the DW dynamics of Fe-rich microwires and observation of essentially non-uniform singe DW propagation in media with graded magnetic anisotropy.

![](https://assets.underline.io/uploads/markdown_image/1/image/6cc90572f9480697e48013153a1184c0.jpg)

Graded magnetic anisotropy appearing as a modification of hysteresis loop character over the microwire length, L, obtained by stress-annealing at variable T (a), v(H) dependencies in as-prepared microwire (b) and in the region with graded magnetic anisotropy (c) and Rc (L) dependence in microwire with graded anisotropy.

Domain wall propagation in Fe-rich magnetic microwires with graded magnetic anisotropy

JOA: Amorphous and Nanocrystalline Soft Magnets I

technical paper

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NOC: Magnetocaloric Materials II

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**Session Chair:** Cristina Bran, *Instituto de Ciencia de Materiales de Madrid*

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**Session chair:** Ahmed Talaat, University of Pittsburgh



COA - Soft Magnetic Materials I: Amorphous and Nanocrystalline

The 15th Joint MMM-INTERMAG Conference (2022 Joint) is sponsored jointly by AIP Publishing and the IEEE Magnetics Society. Members of the international scientific and engineering communities interested in recent developments in fundamental and applied magnetism are invited to attend and contribute to the technical sessions. The technical program will include invited and contributed papers in oral and poster sessions, invited symposia, a plenary session, and an evening session, with about 1500 presentations overall. This Conference provides an outstanding opportunity for worldwide participants to meet their colleagues and collaborators and discuss developments in all areas of magnetism research.

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Paula Corte-Leon

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SHORT BIO

Presentations

Magnetic properties and giant magnetoimpedance effect in multilayered microwires

Effect of temperature on magnetic properties and magnetoimpedance effect in Fe rich microwires

Preparation and magnetic properties of Co2 based Heusler alloy glass

Effect of Applied Stresses on Magnetic Properties of Co and Fe rich Glass

Current Annealing Dependence of Magnetic Properties of Thick Fe rich Glass

Studies of FMR in amorphous glass–coated microwires

Novel Sensing Technique for Non Destructive Composites Monitoring

Graded magnetic anisotropy in Co-rich microwires

Effect of Joule Heating on GMI and Magnetic Properties of Fe-rich Glass-Coated Microwires

Domain wall propagation in Fe-rich magnetic microwires with graded magnetic anisotropy

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