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Title: 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.

Authors:
 [1];  [1];  [2];  [2];  [2];  [2];  [3];  [3];  [1];  [1]
  1. Univ. of South Florida, Tampa, FL (United States)
  2. Univ. of Georgia, Athens, GA (United States)
  3. Colorado State Univ., Fort Collins, CO (United States)
Publication Date:
Research Org.:
Energy Frontier Research Centers (EFRC) (United States). Spins and Heat in Nanoscale Electronic Systems (SHINES)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
OSTI Identifier:
1470122
Alternate Identifier(s):
OSTI ID: 1413028
Grant/Contract Number:  
SC0012670
Resource Type:
Accepted Manuscript
Journal Name:
AIP Advances
Additional Journal Information:
Journal Volume: 8; Journal 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; Journal ID: ISSN 2158-3226
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Phonons; thermal conductivity; thermoelectric; spin dynamics; spintronics

Citation Formats

Das, R., Kalappattil, V., Geng, R., Luong, H., Pham, M., Nguyen, T., Liu, Tao, Wu, Mingzhong, Phan, M. H., and Srikanth, H. Enhanced room-temperature spin Seebeck effect in a YIG/C60/Pt layered heterostructure. United States: N. p., 2017. Web. doi:10.1063/1.5007233.
Das, R., Kalappattil, V., Geng, R., Luong, H., Pham, M., Nguyen, T., Liu, Tao, Wu, Mingzhong, Phan, M. H., & Srikanth, H. Enhanced room-temperature spin Seebeck effect in a YIG/C60/Pt layered heterostructure. United States. https://doi.org/10.1063/1.5007233
Das, R., Kalappattil, V., Geng, R., Luong, H., Pham, M., Nguyen, T., Liu, Tao, Wu, Mingzhong, Phan, M. H., and Srikanth, H. Tue . "Enhanced room-temperature spin Seebeck effect in a YIG/C60/Pt layered heterostructure". United States. https://doi.org/10.1063/1.5007233. https://www.osti.gov/servlets/purl/1470122.
@article{osti_1470122,
title = {Enhanced room-temperature spin Seebeck effect in a YIG/C60/Pt layered heterostructure},
author = {Das, R. and Kalappattil, V. and Geng, R. and Luong, H. and Pham, M. and Nguyen, T. and Liu, Tao and Wu, Mingzhong and Phan, M. H. and Srikanth, H.},
abstractNote = {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.},
doi = {10.1063/1.5007233},
journal = {AIP Advances},
number = 5,
volume = 8,
place = {United States},
year = {2017},
month = {12}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Figures / Tables:

FIG. 1. FIG. 1. : (a) An AFM image of the YIG film grown on a GGG substrate. (b) A schematic illustration of the experimental configuration for the measurement of LSSE in the YIG/C60/Pt system. ∆$T$, $H$, $J$S, and $E$ISHE denote the temperature gradient, magnetic field, spin current, and electric field inducedmore » by ISHE, respectively.« less

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Works referencing / citing this record:

Effect of Charge Localization on the Effective Hyperfine Interaction in Organic Semiconducting Polymers
journal, February 2018


Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.