Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer

S. Ishikawa, H. Sato, Michihiko Yamanouchi, S. Ikeda, S. Fukami, F. Matsukura, H. Ohno

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Magnetic properties of MgO-[Co/Pt] multilayers with a CoFeB insertion layer were investigated and the structure was adopted as a recording layer in magnetic tunnel junctions (MTJs) with perpendicular magnetic easy-axis to attain a high thermal stability. Perpendicular easy-axis was obtained with the Pt thickness range of 0.6-1.2 nm and the CoFeB thickness range of 0.6-1.5 nm. As-made MTJs employing the CoFeB-[Co/Pt] multilayer structure as a recording layer showed tunnel magnetoresistance of 40 on average. A high thermal stability factor over 200 was obtained in the MTJs with the size of 25 nm in diameter.

Original languageEnglish
Article number17C721
JournalJournal of Applied Physics
Volume113
Issue number17
DOIs
Publication statusPublished - 2013 May 7

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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