Nonlocal Detection of Out-of-Plane Magnetization in a Magnetic Insulator by Thermal Spin Drag
Author(s)
Avci, Can Onur; Rosenberg, Ethan Raphael; Huang, Mantao; Bauer, Jackson; Ross, Caroline A.; Beach, Geoffrey Stephen; ... Show more Show less
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We demonstrate a conceptually new mechanism to generate an in-plane spin current with out-of-plane polarization in a nonmagnetic metal, detected by nonlocal thermoelectric voltage measurement. We generate out-of-plane (∇T_{OP}) and in-plane (∇T_{IP}) temperature gradients, simultaneously, acting on a magnetic insulator-Pt bilayer. When the magnetization has a component oriented perpendicular to the plane, ∇T_{OP} drives a spin current into Pt with out-of-plane polarization due to the spin Seebeck effect. ∇T_{IP} then drags the resulting spin-polarized electrons in Pt parallel to the plane against the gradient direction. This finally produces an inverse spin Hall effect voltage in Pt, transverse to ∇T_{IP} and proportional to the out-of-plane component of the magnetization. This simple method enables the detection of the perpendicular magnetization component in a magnetic insulator in a nonlocal geometry.
Date issued
2020-01-17Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Physical review letters
Publisher
American Physical Society
Citation
Avc, Can Onur et al. “Nonlocal Detection of Out-of-Plane Magnetization in a Magnetic Insulator by Thermal Spin Drag.” Physical review letters 124 (2020): 027701 © 2020 The Author(s)
Version: Final published version
ISSN
2331-7019