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Title: Enhancement of spin-Seebeck effect by inserting ultra-thin Fe{sub 70}Cu{sub 30} interlayer

Abstract

We report the longitudinal spin-Seebeck effects (LSSEs) for Pt/Fe{sub 70}Cu{sub 30}/BiY{sub 2}Fe{sub 5}O{sub 12} (BiYIG) and Pt/BiYIG devices. The LSSE voltage was found to be enhanced by inserting an ultra-thin Fe{sub 70}Cu{sub 30} interlayer. This enhancement decays sharply with increasing the Fe{sub 70}Cu{sub 30} thickness, suggesting that it is not due to bulk phenomena, such as a superposition of conventional thermoelectric effects, but due to interface effects related to the Fe{sub 70}Cu{sub 30} interlayer. Combined with control experiments using Pt/Fe{sub 70}Cu{sub 30} devices, we conclude that the enhancement of the LSSE voltage in the Pt/Fe{sub 70}Cu{sub 30}/BiYIG devices is attributed to the improvement of the spin-mixing conductance at the Pt/BiYIG interfaces.

Authors:
 [1];  [2];  [2]; ;  [3];  [2];  [1];  [2];  [2];  [4];  [2];  [1];  [2];  [2];  [2];  [2]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  2. (Japan)
  3. Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 (Japan)
  4. WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
Publication Date:
OSTI Identifier:
22412703
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 106; Journal Issue: 8; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BISMUTH COMPOUNDS; COPPER ALLOYS; ELECTRIC POTENTIAL; FERRITES; INTERFACES; IRON BASE ALLOYS; PLATINUM; SEEBECK EFFECT; SPIN; THIN FILMS; YTTRIUM COMPOUNDS

Citation Formats

Kikuchi, D., E-mail: d.kikuchi@imr.tohoku.ac.jp, WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Ishida, M., Murakami, T., Smart Energy Research Laboratories, NEC Corporation, Tsukuba 305-8501, Uchida, K., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Qiu, Z., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, and CREST, Japan Science and Technology Agency, Tokyo 102-0076. Enhancement of spin-Seebeck effect by inserting ultra-thin Fe{sub 70}Cu{sub 30} interlayer. United States: N. p., 2015. Web. doi:10.1063/1.4913531.
Kikuchi, D., E-mail: d.kikuchi@imr.tohoku.ac.jp, WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Ishida, M., Murakami, T., Smart Energy Research Laboratories, NEC Corporation, Tsukuba 305-8501, Uchida, K., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Qiu, Z., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, & CREST, Japan Science and Technology Agency, Tokyo 102-0076. Enhancement of spin-Seebeck effect by inserting ultra-thin Fe{sub 70}Cu{sub 30} interlayer. United States. doi:10.1063/1.4913531.
Kikuchi, D., E-mail: d.kikuchi@imr.tohoku.ac.jp, WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Ishida, M., Murakami, T., Smart Energy Research Laboratories, NEC Corporation, Tsukuba 305-8501, Uchida, K., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Qiu, Z., Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195, and CREST, Japan Science and Technology Agency, Tokyo 102-0076. Mon . "Enhancement of spin-Seebeck effect by inserting ultra-thin Fe{sub 70}Cu{sub 30} interlayer". United States. doi:10.1063/1.4913531.
@article{osti_22412703,
title = {Enhancement of spin-Seebeck effect by inserting ultra-thin Fe{sub 70}Cu{sub 30} interlayer},
author = {Kikuchi, D., E-mail: d.kikuchi@imr.tohoku.ac.jp and WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 and Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 and Ishida, M. and Murakami, T. and Smart Energy Research Laboratories, NEC Corporation, Tsukuba 305-8501 and Uchida, K. and Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 and PRESTO, Japan Science and Technology Agency, Saitama 332-0012 and Qiu, Z. and Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 and Saitoh, E. and WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 and Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 and Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195 and CREST, Japan Science and Technology Agency, Tokyo 102-0076},
abstractNote = {We report the longitudinal spin-Seebeck effects (LSSEs) for Pt/Fe{sub 70}Cu{sub 30}/BiY{sub 2}Fe{sub 5}O{sub 12} (BiYIG) and Pt/BiYIG devices. The LSSE voltage was found to be enhanced by inserting an ultra-thin Fe{sub 70}Cu{sub 30} interlayer. This enhancement decays sharply with increasing the Fe{sub 70}Cu{sub 30} thickness, suggesting that it is not due to bulk phenomena, such as a superposition of conventional thermoelectric effects, but due to interface effects related to the Fe{sub 70}Cu{sub 30} interlayer. Combined with control experiments using Pt/Fe{sub 70}Cu{sub 30} devices, we conclude that the enhancement of the LSSE voltage in the Pt/Fe{sub 70}Cu{sub 30}/BiYIG devices is attributed to the improvement of the spin-mixing conductance at the Pt/BiYIG interfaces.},
doi = {10.1063/1.4913531},
journal = {Applied Physics Letters},
number = 8,
volume = 106,
place = {United States},
year = {Mon Feb 23 00:00:00 EST 2015},
month = {Mon Feb 23 00:00:00 EST 2015}
}