Interlayer exchange coupling between perpendicularly magnetized structures through a Ru/Ta composite spacer

Seok Jin Yun, Sang Ho Lim, Seong Rae Lee

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

In stacks using a Ru/Ta composite spacer [Pt/Co]6/Ru/Ta/CoFeB/MgO, both strong interlayer exchange coupling and perpendicular magnetic anisotropy are achieved. The composite spacer has the additional advantages of high post-annealing stability over a conventional Ru spacer; for a Ru (0.8 nm)/Ta (0.4 nm) spacer, where the antiparallel coupling is strongest, the coupling strength remains nearly constant at the highest annealing temperature of 375 °C. An interlayer exchange coupling is observed at very small Ru thicknesses down to 0.2 nm, which can be compared with the previous limit of 0.6 nm.

Original languageEnglish
Article number132401
JournalApplied Physics Letters
Volume106
Issue number13
DOIs
Publication statusPublished - 2015 Mar 30

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spacers
interlayers
composite materials
annealing
anisotropy
temperature

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Interlayer exchange coupling between perpendicularly magnetized structures through a Ru/Ta composite spacer. / Yun, Seok Jin; Lim, Sang Ho; Lee, Seong Rae.

In: Applied Physics Letters, Vol. 106, No. 13, 132401, 30.03.2015.

Research output: Contribution to journalArticle

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AB - In stacks using a Ru/Ta composite spacer [Pt/Co]6/Ru/Ta/CoFeB/MgO, both strong interlayer exchange coupling and perpendicular magnetic anisotropy are achieved. The composite spacer has the additional advantages of high post-annealing stability over a conventional Ru spacer; for a Ru (0.8 nm)/Ta (0.4 nm) spacer, where the antiparallel coupling is strongest, the coupling strength remains nearly constant at the highest annealing temperature of 375 °C. An interlayer exchange coupling is observed at very small Ru thicknesses down to 0.2 nm, which can be compared with the previous limit of 0.6 nm.

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