L12 phase formation and giant exchange anisotropy in Mn3Ir/Co-Fe bilayers

Masakiyo Tsunoda; Ken ichi Imakita; Mamiko Naka; Migaku Takahashi

doi:10.1016/j.jmmm.2006.02.007

L1₂ phase formation and giant exchange anisotropy in Mn₃Ir/Co-Fe bilayers

Masakiyo Tsunoda, Ken ichi Imakita, Mamiko Naka, Migaku Takahashi

ENG - Electronic Engineering

Research output: Contribution to journal › Article › peer-review

33 Citations (Scopus)

Abstract

The degree of order S of Mn-Ir layers and the exchange anisotropy of Mn-Ir/Co-Fe bilayers were investigated for various chemical compositions of Mn-Ir layers, underlayer materials, and underlayer thicknesses. It was found that: (1) The compositional range over which L1₂-phase Mn₃Ir could be formed is 22-32 at% Ir and giant exchange anisotropy is obtained in this range. (2) Ru is favorable as an underlayer material for avoiding interdiffusion with the Mn-Ir layer during deposition on the temperature elevated substrate. (3) The underlayer thickness could be reduced to 5 nm while maintaining a giant exchange anisotropy in excess of 1 erg/cm².

Original language	English
Pages (from-to)	55-59
Number of pages	5
Journal	Journal of Magnetism and Magnetic Materials
Volume	304
Issue number	1
DOIs	https://doi.org/10.1016/j.jmmm.2006.02.007
Publication status	Published - 2006 Sep 1

Keywords

Antiferromagnet
Exchange anisotropy
Exchange bias
Ordered alloy

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "L12 phase formation and giant exchange anisotropy in Mn3Ir/Co-Fe bilayers",

abstract = "The degree of order S of Mn-Ir layers and the exchange anisotropy of Mn-Ir/Co-Fe bilayers were investigated for various chemical compositions of Mn-Ir layers, underlayer materials, and underlayer thicknesses. It was found that: (1) The compositional range over which L12-phase Mn3Ir could be formed is 22-32 at% Ir and giant exchange anisotropy is obtained in this range. (2) Ru is favorable as an underlayer material for avoiding interdiffusion with the Mn-Ir layer during deposition on the temperature elevated substrate. (3) The underlayer thickness could be reduced to 5 nm while maintaining a giant exchange anisotropy in excess of 1 erg/cm2.",

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AU - Tsunoda, Masakiyo

AU - Imakita, Ken ichi

AU - Naka, Mamiko

AU - Takahashi, Migaku

PY - 2006/9/1

Y1 - 2006/9/1

N2 - The degree of order S of Mn-Ir layers and the exchange anisotropy of Mn-Ir/Co-Fe bilayers were investigated for various chemical compositions of Mn-Ir layers, underlayer materials, and underlayer thicknesses. It was found that: (1) The compositional range over which L12-phase Mn3Ir could be formed is 22-32 at% Ir and giant exchange anisotropy is obtained in this range. (2) Ru is favorable as an underlayer material for avoiding interdiffusion with the Mn-Ir layer during deposition on the temperature elevated substrate. (3) The underlayer thickness could be reduced to 5 nm while maintaining a giant exchange anisotropy in excess of 1 erg/cm2.

AB - The degree of order S of Mn-Ir layers and the exchange anisotropy of Mn-Ir/Co-Fe bilayers were investigated for various chemical compositions of Mn-Ir layers, underlayer materials, and underlayer thicknesses. It was found that: (1) The compositional range over which L12-phase Mn3Ir could be formed is 22-32 at% Ir and giant exchange anisotropy is obtained in this range. (2) Ru is favorable as an underlayer material for avoiding interdiffusion with the Mn-Ir layer during deposition on the temperature elevated substrate. (3) The underlayer thickness could be reduced to 5 nm while maintaining a giant exchange anisotropy in excess of 1 erg/cm2.

KW - Antiferromagnet

KW - Exchange anisotropy

KW - Exchange bias

KW - Ordered alloy

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