Magnetic tunnel junctions with metastable bcc Co3Mn electrodes

Abstract

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.

Metadata

Authors/Creators:	Kunimatsu, Kazuma Tsuchiya, Tomoki Roy, Tufan Elphick, Kelvin (kyel500@york.ac.uk) Tsujikawa, Masahito Hirohata, Atsufumi https://orcid.org/0000-0001-9107-2330 Shirai, Masafumi Mizukami, Shigemi
Copyright, Publisher and Additional Information:	© 2020 The Japan Society of Applied Physics. This is an author-produced version of the published paper. Uploaded in accordance with the publisher’s self-archiving policy. Further copying may not be permitted; contact the publisher for details.
Dates:	Accepted: 21 July 2020 Published: 4 August 2020
Institution:	The University of York
Academic Units:	The University of York > Faculty of Sciences (York) > Electronic Engineering (York)
Depositing User:	Pure (York)
Date Deposited:	29 Jul 2020 13:10
Last Modified:	06 Jan 2024 00:45
Published Version:	https://doi.org/10.35848/1882-0786/aba883
Status:	Published
Refereed:	Yes
Identification Number:	https://doi.org/10.35848/1882-0786/aba883

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Magnetic tunnel junctions with metastable bcc Co3Mn electrodes

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