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

被引：16
|
作者：
Dohi, T. [1 ]
Kanai, S. [1 ,2 ,3 ]
Matsukura, F. [1 ,2 ,3 ,4 ]
Ohno, H. [1 ,2 ,3 ,4 ,5 ]
机构：
[1] Tohoku Univ, Lab Nanoelect & Spintron, Elect Commun Res Inst, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[2] Tohoku Univ, Ctr Spintron Integrated Syst, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[3] Tohoku Univ, Ctr Spintron Res Network, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[4] Tohoku Univ, WPI Adv Inst Mat Res, Aoba Ku, 2-1-1 Katahira, Sendai, Miyagi 9808577, Japan
[5] Tohoku Univ, Ctr Innovat Integrated Elect Syst, Aoba Ku, 468-1 Aramaki Aza Aoba, Sendai, Miyagi 9800845, Japan
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 07期
关键词：
D O I：
10.1063/1.4999312
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
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. Published by AIP Publishing.
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页数：3
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