Nonlocal Detection of Out-of-Plane Magnetization in a Magnetic Insulator by Thermal Spin Drag
Name
PhysRevLett.124.027701.pdf
Size
1.67 MB
Format
Adobe PDF
Checksum (MD5)
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Author(s)
Avci, Can Onur
Rosenberg, Ethan Raphael
Huang, Mantao
Bauer, Jackson
Ross, Caroline A.
Beach, Geoffrey Stephen
Date Issued
January 17, 2020
Journal
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
Abstract
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.
MIT Department
Massachusetts Institute of Technology. Department of Materials Science and Engineering
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DOI of Published Version
https://doi.org/10.1103/PhysRevLett.124.027701
