An effect of capping-layer material on interfacial anisotropy and thermal stability factor of MgO/CoFeB/Ta/CoFeB/MgO/capping-layer structure

M. Bersweiler, E. C.I. Enobio, Shunsuke Fukami, Hideo Sato, Hideo Ohno

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We investigate the magnetic properties of a MgO/CoFeB/Ta/CoFeB/MgO/capping-layer (Ru or Ta) structure and properties of a magnetic tunnel junction with the structure as a free layer. By using Ru instead of Ta as the capping layer, interfacial anisotropy Ki increases by a factor of ∼2 and a smaller damping constant is obtained. The increase in Ki results in an enhancement of the thermal stability factor of the free layer with the Ru capping layer compared with that with the Ta capping layer in magnetic tunnel junctions.

Original languageEnglish
Article number172401
JournalApplied Physics Letters
Volume113
Issue number17
DOIs
Publication statusPublished - 2018 Oct 22

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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