Heat-driven spin transport in a ferromagnetic metal
Abstract
As a non-magnetic heavy metal is attached to a ferromagnet, a vertically flowing heat-driven spin current is converted to a transverse electric voltage, which is known as the longitudinal spin Seebeck effect (SSE). If the ferromagnet is a metal, this voltage is also accompanied by voltages from two other sources, i.e., the anomalous Nernst effect in both the ferromagnet and the proximity-induced ferromagnetic boundary layer. By properly identifying and carefully separating those different effects, we find that in this pure spin current circuit the additional spin current drawn by the heavy metal generates another significant voltage by the ferromagnetic metal itself which should be present in all relevant experiments.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 15, 2014
- Source ID
- 10.1063/1.4904467
Entities
People
- Bowen Yang
- Chi Tang
- Jing Shi
- Michael L Schneider
- Renu Whig
- Yadong Xu
- Zilong Jiang
Organizations
- Defense Advanced Research Projects Agency
- Freescale Semiconductor
- United States Department of Energy
- University of California