Spin Seebeck effect in the polar antiferromagnet α-Cu                         2                          V                         2                         O                         7

Y. Shiomi; R. Takashima; D. Okuyama; G. Gitgeatpong; P. Piyawongwatthana; K. Matan; T. J. Sato; E. Saitoh

doi:10.1103/PhysRevB.96.180414

Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇

Y. Shiomi, R. Takashima, D. Okuyama, G. Gitgeatpong, P. Piyawongwatthana, K. Matan, T. J. Sato, E. Saitoh

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

19 Citations (Scopus)

Abstract

We have studied the longitudinal spin Seebeck effect in a polar antiferromagnet α-Cu ₂ V ₂ O ₇ in contact with a Pt film. Below the antiferromagnetic transition temperature of α-Cu ₂ V ₂ O ₇ , spin Seebeck voltages whose magnetic-field dependence is similar to that reported in antiferromagnetic MnF2|Pt bilayers are observed. Though a small weak-ferromagnetic moment appears owing to the Dzyaloshinskii-Moriya interaction in α-Cu ₂ V ₂ O ₇ , the magnetic-field dependence of spin Seebeck voltages is found to be irrelevant to the weak-ferromagnetic moments. The dependences of the spin Seebeck voltages on magnetic fields and temperature are analyzed by a magnon spin-current theory. The numerical calculation of spin Seebeck voltages using magnetic parameters of α-Cu ₂ V ₂ O ₇ determined by previous neutron-scattering studies reveals that the magnetic-field and temperature dependences of the spin Seebeck voltages for α-Cu ₂ V ₂ O ₇ Pt are governed by the changes in magnon lifetimes with magnetic fields and temperature.

Original language	English
Article number	180414
Journal	Physical Review B
Volume	96
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.96.180414
Publication status	Published - 2017 Nov 28

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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10.1103/PhysRevB.96.180414

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Shiomi, Y., Takashima, R., Okuyama, D., Gitgeatpong, G., Piyawongwatthana, P., Matan, K., Sato, T. J., & Saitoh, E. (2017). Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇ Physical Review B, 96(18), [180414]. https://doi.org/10.1103/PhysRevB.96.180414

Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇ . / Shiomi, Y.; Takashima, R.; Okuyama, D. et al.

In: Physical Review B, Vol. 96, No. 18, 180414, 28.11.2017.

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

Shiomi, Y, Takashima, R, Okuyama, D, Gitgeatpong, G, Piyawongwatthana, P, Matan, K, Sato, TJ & Saitoh, E 2017, ' Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇ ', Physical Review B, vol. 96, no. 18, 180414. https://doi.org/10.1103/PhysRevB.96.180414

Shiomi Y, Takashima R, Okuyama D, Gitgeatpong G, Piyawongwatthana P, Matan K et al. Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇ Physical Review B. 2017 Nov 28;96(18):180414. doi: 10.1103/PhysRevB.96.180414

@article{c50ecfca94b744c2b80eeaaf2e067031,

title = " Spin Seebeck effect in the polar antiferromagnet α-Cu 2 V 2 O 7 ",

abstract = " We have studied the longitudinal spin Seebeck effect in a polar antiferromagnet α-Cu 2 V 2 O 7 in contact with a Pt film. Below the antiferromagnetic transition temperature of α-Cu 2 V 2 O 7 , spin Seebeck voltages whose magnetic-field dependence is similar to that reported in antiferromagnetic MnF2|Pt bilayers are observed. Though a small weak-ferromagnetic moment appears owing to the Dzyaloshinskii-Moriya interaction in α-Cu 2 V 2 O 7 , the magnetic-field dependence of spin Seebeck voltages is found to be irrelevant to the weak-ferromagnetic moments. The dependences of the spin Seebeck voltages on magnetic fields and temperature are analyzed by a magnon spin-current theory. The numerical calculation of spin Seebeck voltages using magnetic parameters of α-Cu 2 V 2 O 7 determined by previous neutron-scattering studies reveals that the magnetic-field and temperature dependences of the spin Seebeck voltages for α-Cu 2 V 2 O 7 Pt are governed by the changes in magnon lifetimes with magnetic fields and temperature.",

author = "Y. Shiomi and R. Takashima and D. Okuyama and G. Gitgeatpong and P. Piyawongwatthana and K. Matan and Sato, {T. J.} and E. Saitoh",

note = "Funding Information: The authors thank T. Kikkawa for critical comments on this Rapid Communication. This work was supported by JST ERATO “Spin Quantum Rectification Project” (Grant No. JPMJER1402), JSPS KAKENHI (Grants No. 17H04806, No. JP16H00977, No. 16K13827, No. 17K18744, and No. 15J01700), and MEXT [Innovative Area “Nano Spin Conversion Science” (Grant No. 26103005)]. Work at IMRAM is partly supported by the research program “Dynamic alliance for open innovation bridging human, environment, and materials.” Work at Mahidol University was supported in part by the Thailand Research Fund Grant No. RSA5880037 and the Faculty of Science, Mahidol University. Publisher Copyright: {\textcopyright} 2017 American Physical Society.",

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T1 - Spin Seebeck effect in the polar antiferromagnet α-Cu 2 V 2 O 7

AU - Shiomi, Y.

AU - Takashima, R.

AU - Okuyama, D.

AU - Gitgeatpong, G.

AU - Piyawongwatthana, P.

AU - Matan, K.

AU - Sato, T. J.

AU - Saitoh, E.

N1 - Funding Information: The authors thank T. Kikkawa for critical comments on this Rapid Communication. This work was supported by JST ERATO “Spin Quantum Rectification Project” (Grant No. JPMJER1402), JSPS KAKENHI (Grants No. 17H04806, No. JP16H00977, No. 16K13827, No. 17K18744, and No. 15J01700), and MEXT [Innovative Area “Nano Spin Conversion Science” (Grant No. 26103005)]. Work at IMRAM is partly supported by the research program “Dynamic alliance for open innovation bridging human, environment, and materials.” Work at Mahidol University was supported in part by the Thailand Research Fund Grant No. RSA5880037 and the Faculty of Science, Mahidol University. Publisher Copyright: © 2017 American Physical Society.

PY - 2017/11/28

Y1 - 2017/11/28

N2 - We have studied the longitudinal spin Seebeck effect in a polar antiferromagnet α-Cu 2 V 2 O 7 in contact with a Pt film. Below the antiferromagnetic transition temperature of α-Cu 2 V 2 O 7 , spin Seebeck voltages whose magnetic-field dependence is similar to that reported in antiferromagnetic MnF2|Pt bilayers are observed. Though a small weak-ferromagnetic moment appears owing to the Dzyaloshinskii-Moriya interaction in α-Cu 2 V 2 O 7 , the magnetic-field dependence of spin Seebeck voltages is found to be irrelevant to the weak-ferromagnetic moments. The dependences of the spin Seebeck voltages on magnetic fields and temperature are analyzed by a magnon spin-current theory. The numerical calculation of spin Seebeck voltages using magnetic parameters of α-Cu 2 V 2 O 7 determined by previous neutron-scattering studies reveals that the magnetic-field and temperature dependences of the spin Seebeck voltages for α-Cu 2 V 2 O 7 Pt are governed by the changes in magnon lifetimes with magnetic fields and temperature.

AB - We have studied the longitudinal spin Seebeck effect in a polar antiferromagnet α-Cu 2 V 2 O 7 in contact with a Pt film. Below the antiferromagnetic transition temperature of α-Cu 2 V 2 O 7 , spin Seebeck voltages whose magnetic-field dependence is similar to that reported in antiferromagnetic MnF2|Pt bilayers are observed. Though a small weak-ferromagnetic moment appears owing to the Dzyaloshinskii-Moriya interaction in α-Cu 2 V 2 O 7 , the magnetic-field dependence of spin Seebeck voltages is found to be irrelevant to the weak-ferromagnetic moments. The dependences of the spin Seebeck voltages on magnetic fields and temperature are analyzed by a magnon spin-current theory. The numerical calculation of spin Seebeck voltages using magnetic parameters of α-Cu 2 V 2 O 7 determined by previous neutron-scattering studies reveals that the magnetic-field and temperature dependences of the spin Seebeck voltages for α-Cu 2 V 2 O 7 Pt are governed by the changes in magnon lifetimes with magnetic fields and temperature.

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Spin Seebeck effect in the polar antiferromagnet α-Cu ₂ V ₂ O ₇

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