United States

kondo screening

cefe11ti

twins

coercivity

It is our great pleasure to invite you to attend the 26th International Workshop on Rare Earth and Future Permanent Magnets and Their Applications (REPM2021) which will be held virtually on June 7-10, 2021. Please note, this is an updated schedule due to COVID-19 travel restrictions which forced us to postpone the conference from summer of 2020. The REPM workshop takes place every two years and is the premier conference on permanent magnets covering a wide range of topics including:

* Rare earth magnets
* Rare earth-free magnets
* Raw materials, mining and recycling
* Advanced synthesis, processing and characterization techniques
* Theoretical modeling of coercivity
* Fundamental properties of advanced magnetic materials
* Thin film magnets
* Applications of permanent magnets

***Workshop***
The workshop will be chaired by Professor George C. Hadjipanayis, University of Delaware, Newark, DE and Dr. Jinfang Liu, President & COO of Electron Energy Corporation, Landisville, PA.
The objectives of the workshop are to bring together engineers and scientists who work on permanent magnets and their applications to present their latest results and exchange ideas on a wide range of relevant topics including resources, raw materials, recycling, processing, fundamental and hard magnetic properties and applications of rare earth and future magnets.

To regsiter for this event, please follow the link below.

REPM 2021: The 26th International Workshop on Rare-Earth and Future Permanent Magnets and their Applications

The criticality of rare-earth elements and its impact on the permanent magnet market have initiated a search for alternative material systems, either to fill the magnetic performance gap between ferrites and Nd-Fe-B magnets or to even replace the existing benchmark systems. Ce-based systems are attractive due to the abundance of cerium, however the formation of secondary phases leads to challenges for Ce-based compounds.
In this work we investigated the phase formation properties of CeFe11Ti system together with the microstructural and magnetic properties. Additionally we carried out introduction of interstitial nitrogen and hydrogen atoms to the parent system. The structural and magnetic characterizations of the interstitially doped systems are also investigated by means of experiments and theoretical calculations. A significant reduction is observed for the anisotropy field values of nitrogenated CeFe11TiNx composition and the reason for this reduction is associated to the Kondo screening of the Ce-4f magnetic moment in the ThMn12-type system. The calculations show the enhancement of the screening of the 4f moment for the nitrogenated samples [1]. 
Temperature dependent structural analysis of the CeFe11Ti composition indicate an Invar-type anomaly around the Curie temperature where a M2 behavior is observed as expected from the magnetostriction theory. Microstructural analysis results indicate the formation of twinned grains which are also observed for other ThMn12-type structures with a twin angle of 58°±2° [2]. 
Isothermal magnetization measurements of CeFe11Ti compound under hydrostatic pressure were carried out and a slight decrease in the anisotropy field values is observed. This reduction of the anisotropy is associated to the expected reduction of the Curie temperature under 0.45 GPa hydrostatic pressure.
This work was supported by Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) RE-MAP project with the project number 316912154 and MagHEM commissioned by NEDO, Japan.
[1] A. Galler, S. Ener, F. Maccari, I. Dirba, K. P. Skokov, O. Gutfleisch, S. Biermann, L.V. Pourovskii, njp Quantum Materials, 6 (2021) 2
[2] F. Maccari, S. Ener, D. koch, I. Dirba, K. P. Skokov, E. Bruder, L. Schäfer and O. Gutfleisch, Journal of Alloys and Compounds, 867 (2021) 158805


Correlating changes of the unit cell and microstructure with the magnetic properties of CeFe11TiX compounds

poster

Laser Powder Bed Fusion of Nd-Fe-B Permanent Magnets: Solving the Optimization Problem using Design of Experiments and Statistics

Microstructural engineering through grain boundary modification for improved recycled rare earth permanent magnets

Production of Nd-Fe-B based powders for Laser-Powder-Bed-Fusion - the 3DREMAG Project

High performance Ce-substituted hot-deformed magnets with 20% Nd reduction

An overview on Rare-Earths market and recycling

Structural refinement and magnetic properties of SmCo5-Cu nanocomposites after high pressure torsion

Heat magnetizing method for high-performance neodymium magnets (hot-deformed Nd-Fe-B magnets)

Doping effect of R80Al20 (R= Ce and Dy) alloy powders on the magnetic properties of hot-deformed NdFeB magnet with various reduction ratios

Investigating the magnetic coupling of hard (SrFe12O19) and soft (Co) phases in atomic contact

Formation of Carbide Phases in MnAl-C Magnets

Correlating changes of the unit cell and microstructure with the magnetic properties of CeFe11TiX compounds

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