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

Das, R.; Kalappattil, V.; Geng, R.; Luong, H.; Pham, M.; Nguyen, T.; Liu, Tao; Wu, Mingzhong; Phan, M. H.; Srikanth, H.

doi:10.1063/1.5007233

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

Journal Article · Tue Dec 12 00:00:00 EST 2017 · AIP Advances

DOI:https://doi.org/10.1063/1.5007233· OSTI ID:1470122

Das, R. ^[1]; Kalappattil, V. ^[1]; Geng, R. ^[2]; Luong, H. ^[2]; Pham, M. ^[2]; Nguyen, T. ^[2]; Liu, Tao ^[3]; Wu, Mingzhong ^[3]; Phan, M. H. ^[1]; Srikanth, H. ^[1]

Univ. of South Florida, Tampa, FL (United States)
Univ. of Georgia, Athens, GA (United States)
Colorado State Univ., Fort Collins, CO (United States)

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.

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Research Organization:: Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0012670

OSTI ID:: 1470122

Alternate ID(s):: OSTI ID: 1413028

Journal Information:: AIP Advances, Vol. 8, Issue 5; Related Information: SHINES partners with University of California, Riverside (lead); Arizona State University; Colorado State University; Johns Hopkins University; University of California Irvine; University of California Los Angeles; University of Texas at Austin; ISSN 2158-3226

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Figures / Tables (3)

FIG. 1.(p. 3)

FIG. 2.(p. 4)

FIG. 3.(p. 5)

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References (18)

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