Bulletin of the American Physical Society
APS March Meeting 2018
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session E05: Anomalous Transverse Transport in Mn3X Non-collinear Antiferromagnets
8:00 AM–11:00 AM,
Tuesday, March 6, 2018
LACC Room: 152
Sponsoring Units: DCMP DCOMP GMAG
Chair: Claudia Felser, Max Planck Inst
Abstract: E05.00004 : Cluster multipole theory for anomalous Hall effect in antiferromagnets*
9:48 AM–10:24 AM
View Presentation Abstract
Recently, it has been theoretically and experimentally shown that antiferromagnets such as Mn3Ir, Mn3Sn and Mn3Ge exhibit extremely large anomalous Hall effect (AHE) [1,2,3,4,5], anomalous Nernst effect (ANE) [6,7], and magneto-optical Kerr effect (MOKE) . While AHE/ANE/MOKE in ferromagnets usually scale with the magnetization of the system, it is a non-trivial problem which macroscopic order parameter determines these effects in antiferromagnets. In this talk, we introduce a new order parameter, which we call cluster multipole (CMP) moment, and show that CMP is useful to classify the magnetic structure and discuss the physical properties of antiferromagnets. In particular, we demonstrate that AHE in Mn3Sn and that in elemental Fe can be described in the unified scheme using CMP . We also discuss how CMP is useful for constructing database for magnets and designing functional antiferromagnets.
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*This work was supported by JSPS KAKENHI Grant Numbers JP15K17713, JP15H05883 (J-Physics), JP16H04021, JP16H00924, JP16H06345 and PRESTO and CREST, Japan Science and Technology Agency.
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