Magnetic tunnel junctions with metastable bcc Co3Mn electrodes

被引：18

作者：

Kunimatsu, Kazuma ^{[1
,2
]}

Tsuchiya, Tomoki ^{[3
,4
]}

Roy, Tufan ^{[5
]}

Elphick, Kelvin ^{[6
]}

Ichinose, Tomohiro ^{[2
]}

Tsujikawa, Masahito ^{[4
,5
]}

Hirohata, Atsufumi ^{[6
]}

Shirai, Masafumi ^{[3
,4
,5
]}

Mizukami, Shigemi ^{[2
,3
,4
]}

机构：

[1] Tohoku Univ, Dept Appl Phys, Aoba 6-6-05, Sendai, Miyagi 9808579, Japan

[2] Tohoku Univ, WPI Adv Inst Mat Res, Katahira 2-1-1, Sendai, Miyagi 9808577, Japan

[3] Tohoku Univ, Core Res Cluster CRC, Ctr Sci & Innovat Spintron CSIS, Sendai, Miyagi 9808577, Japan

[4] Tohoku Univ, Ctr Spintron Res Network CSRN, Sendai, Miyagi 9808577, Japan

[5] Tohoku Univ, Res Inst Elect Commun RIEC, Sendai, Miyagi 9808579, Japan

[6] Univ York, Dept Elect Engn, York YO10 5DD, N Yorkshire, England

来源：

APPLIED PHYSICS EXPRESS | 2020年 / 13卷 / 08期

基金：

英国工程与自然科学研究理事会;

关键词：

magnetic tunnel junction; tunnel magnetoresistance; MgO; metastable alloys; ROOM-TEMPERATURE; EPITAXIAL-GROWTH; MAGNETORESISTANCE; CO;

D O I：

10.35848/1882-0786/aba883

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We studied magnetic tunnel junctions (MTJs) with a MgO(001) barrier and metastable bcc Co3Mn(001) disordered alloy electrodes. A tunnel magnetoresistance (TMR) ratio was approximately 200%-250% observed at room temperature. We successfully observed the TMR ratio greater than 600% at 10 K which was higher than the past reported value of MgO-based MTJs with ultrathin bcc Co(001) electrodes. However, our experimental value was still much lower than the past theoretical prediction in bcc Co/MgO/Co(001) MTJs. We discuss some differences in the bulk band structure affecting the TMR effect for bcc Co and bcc Co3Mn.

引用

页数：5

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