Self-consistent study of local and nonlocal magnetoresistance in a YIG/Pt bilayer
Abstract
We present a self-consistent study of the local spin Hall magnetoresistance (SMR) and nonlocal magnon-mediated magnetoresistance (MMR) in a heavy-metal/magnetic-insulator heterostructure at finite temperature. We find that the thermal fluctuation of magnetization significantly affects the SMR. It appears unidirectional with respect to the direction of electrical current (or magnetization). The unidirectionality of SMR originates from the asymmetry of creation or annihilation of thermal magnons induced by the spin Hall torque. Also, a self-consistent model can well describe the features of MMR.
- Publication:
-
Physical Review B
- Pub Date:
- March 2018
- DOI:
- 10.1103/PhysRevB.97.094401
- Bibcode:
- 2018PhRvB..97i4401W