Bulletin of the American Physical Society
APS March Meeting 2023
Volume 68, Number 3
Las Vegas, Nevada (March 5-10)
Virtual (March 20-22); Time Zone: Pacific Time
Session T57: Spin Transport and Dynamics in Antiferromagnets
11:30 AM–2:18 PM,
Thursday, March 9, 2023
Room: Room 303
Sponsoring
Unit:
GMAG
Chair: Soho Shim, University of Illinois at Urbana-Champaign
Abstract: T57.00003 : Effect of heat diffusion on current-driven magnetization switching in non-collinear antiferromagnets*
12:18 PM–12:30 PM
Presenter:
Myoung-Woo Yoo
(University of Illinois at Urbana-Champaign)
Authors:
Myoung-Woo Yoo
(University of Illinois at Urbana-Champaign)
Virginia O Lorenz
(University of Illinois at Urbana-Champaign)
David G Cahill
(University of Illinois at Urbana-Champaign)
Axel Hoffmann
(University of Illinois at Urbana-Champaign)
Here, we show the effect of heat flow to substrates on the critical current for magnetization switching in non-collinear AF Mn3Sn. We fabricate Hall bar devices using polycrystalline W/Mn3Sn multilayers on thermally-oxidized Si substrates with different thicknesses of SiO2 layers, h. Different thicknesses of the oxide layer result in temperature differences between the devices when identical electric currents are applied. The devices show similar behavior under field-driven switching. However, in the case of current-driven switching, the coercive current, Ic, is dependent on h. This behavior can be explained by a heat-diffusion model, , when h > 300 nm. If h is thinner than 50 nm, however, Ic is smaller than the analytic model.
[1] T. Chen, et al., Nat. Commun. 12, 572 (2021).
[2] S. Nakatsuji, et al., Nature 527, 212 (2015).
[3] H. Tsai, et al., Nature 580, 608 (2020).
[4] G. K. Krishnaswamy, et al., Phys. Rev. Appl. 18, 024064 (2022).
*This work is supported by the NSF through the Illinois MRSEC (DMR-1720633).
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