Magnetic-field-induced decrease of the spin Peltier effect in Pt/Y3Fe5 O12 system at room temperature

Ryuichi Itoh; Ryo Iguchi; Shunsuke Daimon; Koichi Oyanagi; Ken Ichi Uchida; Eiji Saitoh

doi:10.1103/PhysRevB.96.184422

Magnetic-field-induced decrease of the spin Peltier effect in Pt/Y3Fe5 O12 system at room temperature

Ryuichi Itoh, Ryo Iguchi, Shunsuke Daimon, Koichi Oyanagi, Ken Ichi Uchida, Eiji Saitoh

Research output: Contribution to journal › Article › peer-review

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Abstract

We report the observation of magnetic-field-induced decrease of the spin Peltier effect (SPE) in a junction of a paramagnetic metal Pt and a ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. For driving the SPE, spin currents are generated via the spin Hall effect from applied charge currents in the Pt layer, and injected into the adjacent thick YIG film. The resultant temperature modulation is detected by a commonly used thermocouple attached to the Pt/YIG junction. The output of the thermocouple shows sign reversal when the magnetization is reversed and linearly increases with the applied current, demonstrating the detection of the SPE signal. We found that the SPE signal decreases with the magnetic field. The observed decreasing rate was found to be comparable to that of the spin Seebeck effect (SSE), suggesting the dominant and similar contribution of the low-energy magnons in the SPE as in the SSE.

Original language	English
Article number	184422
Journal	Physical Review B
Volume	96
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.96.184422
Publication status	Published - 2017 Nov 20

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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@article{7bc9fe19a75c461fb2b0e8eb3a971c6f,

title = "Magnetic-field-induced decrease of the spin Peltier effect in Pt/Y3Fe5 O12 system at room temperature",

abstract = "We report the observation of magnetic-field-induced decrease of the spin Peltier effect (SPE) in a junction of a paramagnetic metal Pt and a ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. For driving the SPE, spin currents are generated via the spin Hall effect from applied charge currents in the Pt layer, and injected into the adjacent thick YIG film. The resultant temperature modulation is detected by a commonly used thermocouple attached to the Pt/YIG junction. The output of the thermocouple shows sign reversal when the magnetization is reversed and linearly increases with the applied current, demonstrating the detection of the SPE signal. We found that the SPE signal decreases with the magnetic field. The observed decreasing rate was found to be comparable to that of the spin Seebeck effect (SSE), suggesting the dominant and similar contribution of the low-energy magnons in the SPE as in the SSE.",

author = "Ryuichi Itoh and Ryo Iguchi and Shunsuke Daimon and Koichi Oyanagi and Uchida, {Ken Ichi} and Eiji Saitoh",

note = "Funding Information: The authors thank T. Kikkawa for the aid in measuring the SSE and G. E. W. Bauer and Y. Ohnuma for the valuable discussions. This work was supported by PRESTO “Phase Interfaces for Highly Efficient Energy Utilization” (Grant No. JPMJPR12C1) and ERATO “Spin Quantum Rectification Project” (Grant No. JPMJER1402) from JST, Japan, Grant-in-Aid for Scientific Research (A) (Grant No. JP15H02012), and Grant-in-Aid for Scientific Research on Innovative Area “Nano Spin Conversion Science” (Grant No. JP26103005) from JSPS KAKENHI, Japan, NEC Corporation, the Noguchi Institute, and E-IMR, Tohoku University. S.D. was supported by JSPS through a research fellowship for young scientists (Grant No. JP16J02422). K.O. acknowledges support from GP-Spin at Tohoku University. ",

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doi = "10.1103/PhysRevB.96.184422",

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T1 - Magnetic-field-induced decrease of the spin Peltier effect in Pt/Y3Fe5 O12 system at room temperature

AU - Itoh, Ryuichi

AU - Iguchi, Ryo

AU - Daimon, Shunsuke

AU - Oyanagi, Koichi

AU - Uchida, Ken Ichi

AU - Saitoh, Eiji

N1 - Funding Information: The authors thank T. Kikkawa for the aid in measuring the SSE and G. E. W. Bauer and Y. Ohnuma for the valuable discussions. This work was supported by PRESTO “Phase Interfaces for Highly Efficient Energy Utilization” (Grant No. JPMJPR12C1) and ERATO “Spin Quantum Rectification Project” (Grant No. JPMJER1402) from JST, Japan, Grant-in-Aid for Scientific Research (A) (Grant No. JP15H02012), and Grant-in-Aid for Scientific Research on Innovative Area “Nano Spin Conversion Science” (Grant No. JP26103005) from JSPS KAKENHI, Japan, NEC Corporation, the Noguchi Institute, and E-IMR, Tohoku University. S.D. was supported by JSPS through a research fellowship for young scientists (Grant No. JP16J02422). K.O. acknowledges support from GP-Spin at Tohoku University.

PY - 2017/11/20

Y1 - 2017/11/20

N2 - We report the observation of magnetic-field-induced decrease of the spin Peltier effect (SPE) in a junction of a paramagnetic metal Pt and a ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. For driving the SPE, spin currents are generated via the spin Hall effect from applied charge currents in the Pt layer, and injected into the adjacent thick YIG film. The resultant temperature modulation is detected by a commonly used thermocouple attached to the Pt/YIG junction. The output of the thermocouple shows sign reversal when the magnetization is reversed and linearly increases with the applied current, demonstrating the detection of the SPE signal. We found that the SPE signal decreases with the magnetic field. The observed decreasing rate was found to be comparable to that of the spin Seebeck effect (SSE), suggesting the dominant and similar contribution of the low-energy magnons in the SPE as in the SSE.

AB - We report the observation of magnetic-field-induced decrease of the spin Peltier effect (SPE) in a junction of a paramagnetic metal Pt and a ferrimagnetic insulator Y3Fe5O12 (YIG) at room temperature. For driving the SPE, spin currents are generated via the spin Hall effect from applied charge currents in the Pt layer, and injected into the adjacent thick YIG film. The resultant temperature modulation is detected by a commonly used thermocouple attached to the Pt/YIG junction. The output of the thermocouple shows sign reversal when the magnetization is reversed and linearly increases with the applied current, demonstrating the detection of the SPE signal. We found that the SPE signal decreases with the magnetic field. The observed decreasing rate was found to be comparable to that of the spin Seebeck effect (SSE), suggesting the dominant and similar contribution of the low-energy magnons in the SPE as in the SSE.

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