Enhanced room-temperature spin Seebeck effect in a YIG/C60/Pt layered heterostructure
Abstract
We report on large enhancement of the longitudinal spin Seebeck effect (LSSE) in the Y3Fe5O12 (YIG)/Pt system at room temperature due to the addition of a thin layer of organic semiconductor (C60) in between the YIG and the Pt. LSSE measurements show that the LSSE voltage increases significantly, from the initial value of 150 nV for the YIG/Pt structure to 240 nV for the YIG/C60(5nm)/Pt structure. Radio-frequency transverse susceptibility experiments reveal a significant decrease in the surface perpendicular magnetic anisotropy (PMA) of the YIG film when C60 is deposited on it. These results suggest that the LSSE enhancement may be attributed to increased spin mixing conductance, the decreased PMA, and the large spin diffusion length of C60.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Dec 12, 2017
- Source ID
- 10.1063/1.5007233
Entities
People
- H. Luong
- H. Srikanth
- M. H. Phan
- Mingzhong Wu
- Minh N. Pham
- R. Geng
- Rabindra Das
- Tao Liu
- Thanh Nguyen
- V. Kalappattil
Organizations
- Army Research Office
- Colorado State University
- United States Department of Energy
- University of Georgia
- University of South Florida