Bulletin of the American Physical Society
APS March Meeting 2022
Volume 67, Number 3
Monday–Friday, March 14–18, 2022; Chicago
Session D29: Novel Spin and Charge Excitations and their Manipulations in Antiferromagnetic Weyl Semimetals
3:00 PM–6:00 PM,
Monday, March 14, 2022
Room: McCormick Place W-190B
Sponsoring Units: GMAG DCMP
Chair: Kai Liu, Georgetown University
Abstract: D29.00004 : Chiral-spin rotation in non-collinear antiferromagneticMn3Sn deiven by spin-orbit torque*
4:48 PM–5:24 PM
This presentation shows a new scheme of the electrical control of magnetic materials, i.e., the chiral-spin rotation, observed in non-collinear antiferromagnets . We use Hall-bar devices with an epitaxial stack consisting of a non-collinear antiferromagnetic Mn3Sn and heavy metals with large spin-orbit coupling [3,4]. An unconventional response of the Hall resistance under electric current applications is observed, which can be attributed to the continuous rotation of chiral-spin structure in Mn3Sn driven by the spin-orbit torque. We also find that the efficiency to manipulate the magnetic structure through this scheme is much higher than that in collinear ferromagnets and ferrimagnets.
 S. Nakatsuji et al., Nature 527, 212 (2015).
 Y. Takeuchi et al., Nature Materials 20, 1364 (2021).
 J.-Y. Yoon et al., Appl. Phys. Express 13, 013001 (2019)
 J.-Y. Yoon et al. AIP Adv. 11, 065318 (2021).
*The work has been supported by JSPS Kakenhi 19H05622, 19J13405, and 20K22409 and RIEC Cooperative Research Projects.
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