Enhanced room-temperature spin Seebeck effect in a YIG/C₆₀/Pt layered heterostructure

Authors

R. Das, University of South Florida
V. Kalappattil, University of South Florida
R. Geng, University of Georgia
H. Luong, University of Georgia
M. Pham, University of Georgia
T. Nguyen, University of Georgia
Tao Liu, Colorado State University
Mingzhong Wu, Colorado State University
Manh-Huong Phan, University of South FloridaFollow
Hariharan Srikanth, University of South FloridaFollow

Document Type

Article

Publication Date

2018

Digital Object Identifier (DOI)

https://doi.org/10.1063/1.5007233

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.

Was this content written or created while at USF?

Yes

Citation / Publisher Attribution

AIP Advances, v. 8, issue 5, art. 055906

Scholar Commons Citation

Das, R.; Kalappattil, V.; Geng, R.; Luong, H.; Pham, M.; Nguyen, T.; Liu, Tao; Wu, Mingzhong; Phan, Manh-Huong; and Srikanth, Hariharan, "Enhanced room-temperature spin Seebeck effect in a YIG/C₆₀/Pt layered heterostructure" (2018). Physics Faculty Publications. 41.
https://digitalcommons.usf.edu/phy_facpub/41