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VIDEO DOI: https://doi.org/10.48448/as3a-bp38

technical paper

MMM 2022

November 07, 2022

Minneapolis, United States

High throughput study of spin and orbital transport in magnetic materials

We study the spin Hall effect (SHE) and the orbital Hall effect (OHE) in magnetic materials using automatic high-throughput calculation scheme. The SHE is a phenomenon in which an applied electric field induces a spin current. This effect plays a key role in various spintronics devices. Although the SHE has been researched mainly in nonmagnetic materials, SHE in magnetic materials has gained a considerable attention recently as they can exhibit a large SHE1. The OHE, a phenomenon in which electric field generates a flow of orbital angular momentum, has also been attracting attention as a new driving mechanism of devices 2. For future application, exploring materials with large SHE or OHE is demanded.

In this study, we perform a systematic evaluation of the spin Hall conductivity (SHC) and the orbital Hall conductivity (OHC) of select materials from MAGNDATA3, a database of magnetic materials. We target collinear materials both ferromagnets and antiferromagnets, and evaluate their intrinsic contributions of SHC and OHC based on Kubo-formula.

Figure 1 shows the results of SHC and OHC of 84 materials. The OHCs in most materials are nearly ten times larger than the SHCs. Interestingly, the Mn3Pt has a colossal OHC reaching about 14000 (hbar/e)S/cm, which is higher than either OHC of Mn (~10000) and Pt (~2000) 4, suggesting the importance of the material structure. Further analysis of both theoretical aspect and data science will be presented at the conference.

References 1 C. Qin, et al., Phys. Rev. B 96, 134418 (2017); Y. Zhang et al., New J. Phys. 20, 7 (2018). 2 H. Kontani, et al., J. Phys. Soc. Jpn., 76, 103702 (2007). 3 S.V. Gallego et al., J. Appl. Crystallogr. 49, 1750 (2016). 4 D. Jo, D. Go, and H-W. Lee, Phys. Rev. B 98, 214405 (2018).


Transcript English (automatic)

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