Electric-field effect on spin-wave resonance in a nanoscale CoFeB/MgO magnetic tunnel junction

Takaaki Dohi; S. Kanai; F. Matsukura; H. Ohno

doi:10.1063/1.4999312

Electric-field effect on spin-wave resonance in a nanoscale CoFeB/MgO magnetic tunnel junction

Takaaki Dohi, S. Kanai, F. Matsukura, H. Ohno

Tohoku University

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

17 Citations (Scopus)

Abstract

We investigate the electric-field effect on the exchange stiffness constant in a CoFeB/MgO junction through the observation of the spin-wave resonance in a nanoscale magnetic tunnel junction. We evaluate the electric-field dependence of the stiffness constant from the separation between resonance fields for the Kittel and spin-wave modes under electric fields. The obtained stiffness constant increases when the interfacial electron density is decreased. This dependence is consistent with that determined from the observation of electric-field dependent domain structures.

Original language	English
Article number	072403
Journal	Applied Physics Letters
Volume	111
Issue number	7
DOIs	https://doi.org/10.1063/1.4999312
Publication status	Published - 2017 Aug 14

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title = "Electric-field effect on spin-wave resonance in a nanoscale CoFeB/MgO magnetic tunnel junction",

abstract = "We investigate the electric-field effect on the exchange stiffness constant in a CoFeB/MgO junction through the observation of the spin-wave resonance in a nanoscale magnetic tunnel junction. We evaluate the electric-field dependence of the stiffness constant from the separation between resonance fields for the Kittel and spin-wave modes under electric fields. The obtained stiffness constant increases when the interfacial electron density is decreased. This dependence is consistent with that determined from the observation of electric-field dependent domain structures.",

author = "Takaaki Dohi and S. Kanai and F. Matsukura and H. Ohno",

note = "Funding Information: This work was supported in part by Grants-in-Aid for Scientific Research from MEXT (No. 26103002) as well as JSPS (No. 16H06081), R&D Project for ICT Key Technology of MEXT, the JSPS Core-to-Core program, and the Cooperative Research Project Program of RIEC. T.D. acknowledges the support from GP-Spin at Tohoku University. Publisher Copyright: {\textcopyright} 2017 Author(s).",

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AU - Dohi, Takaaki

AU - Kanai, S.

AU - Matsukura, F.

AU - Ohno, H.

N1 - Funding Information: This work was supported in part by Grants-in-Aid for Scientific Research from MEXT (No. 26103002) as well as JSPS (No. 16H06081), R&D Project for ICT Key Technology of MEXT, the JSPS Core-to-Core program, and the Cooperative Research Project Program of RIEC. T.D. acknowledges the support from GP-Spin at Tohoku University. Publisher Copyright: © 2017 Author(s).

PY - 2017/8/14

Y1 - 2017/8/14

N2 - We investigate the electric-field effect on the exchange stiffness constant in a CoFeB/MgO junction through the observation of the spin-wave resonance in a nanoscale magnetic tunnel junction. We evaluate the electric-field dependence of the stiffness constant from the separation between resonance fields for the Kittel and spin-wave modes under electric fields. The obtained stiffness constant increases when the interfacial electron density is decreased. This dependence is consistent with that determined from the observation of electric-field dependent domain structures.

AB - We investigate the electric-field effect on the exchange stiffness constant in a CoFeB/MgO junction through the observation of the spin-wave resonance in a nanoscale magnetic tunnel junction. We evaluate the electric-field dependence of the stiffness constant from the separation between resonance fields for the Kittel and spin-wave modes under electric fields. The obtained stiffness constant increases when the interfacial electron density is decreased. This dependence is consistent with that determined from the observation of electric-field dependent domain structures.

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Electric-field effect on spin-wave resonance in a nanoscale CoFeB/MgO magnetic tunnel junction

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