Magnetic anisotropy in Ta/CoFeB/MgO investigated by x-ray magnetic circular dichroism and first-principles calculation

Shun Kanai; Masahito Tsujikawa; Yoshio Miura; Masafumi Shirai; Fumihiro Matsukura; Hideo Ohno

doi:10.1063/1.4903296

Magnetic anisotropy in Ta/CoFeB/MgO investigated by x-ray magnetic circular dichroism and first-principles calculation

Shun Kanai, Masahito Tsujikawa, Yoshio Miura, Masafumi Shirai, Fumihiro Matsukura, Hideo Ohno

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

46 Citations (Scopus)

Abstract

We study the spin and orbital magnetic moments in Ta/Co_0.4Fe_0.4B_0.2/MgO by x-ray magnetic circular dichroism measurements as well as first-principles calculations, in order to clarify the origin of the perpendicular magnetic anisotropy. Both experimental and theoretical results show that orbital magnetic moment of Fe is more anisotropic than that of Co with respect to the magnetization direction. The anisotropy is larger for thinner CoFeB, indicating that Fe atoms at the interface with MgO contribute more than Co to the observed perpendicular magnetic anisotropy.

Original language	English
Article number	222409
Journal	Applied Physics Letters
Volume	105
Issue number	22
DOIs	https://doi.org/10.1063/1.4903296
Publication status	Published - 2014 Dec 1

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Magnetic anisotropy in Ta/CoFeB/MgO investigated by x-ray magnetic circular dichroism and first-principles calculation",

abstract = "We study the spin and orbital magnetic moments in Ta/Co0.4Fe0.4B0.2/MgO by x-ray magnetic circular dichroism measurements as well as first-principles calculations, in order to clarify the origin of the perpendicular magnetic anisotropy. Both experimental and theoretical results show that orbital magnetic moment of Fe is more anisotropic than that of Co with respect to the magnetization direction. The anisotropy is larger for thinner CoFeB, indicating that Fe atoms at the interface with MgO contribute more than Co to the observed perpendicular magnetic anisotropy.",

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T1 - Magnetic anisotropy in Ta/CoFeB/MgO investigated by x-ray magnetic circular dichroism and first-principles calculation

AU - Kanai, Shun

AU - Tsujikawa, Masahito

AU - Miura, Yoshio

AU - Shirai, Masafumi

AU - Matsukura, Fumihiro

AU - Ohno, Hideo

PY - 2014/12/1

Y1 - 2014/12/1

N2 - We study the spin and orbital magnetic moments in Ta/Co0.4Fe0.4B0.2/MgO by x-ray magnetic circular dichroism measurements as well as first-principles calculations, in order to clarify the origin of the perpendicular magnetic anisotropy. Both experimental and theoretical results show that orbital magnetic moment of Fe is more anisotropic than that of Co with respect to the magnetization direction. The anisotropy is larger for thinner CoFeB, indicating that Fe atoms at the interface with MgO contribute more than Co to the observed perpendicular magnetic anisotropy.

AB - We study the spin and orbital magnetic moments in Ta/Co0.4Fe0.4B0.2/MgO by x-ray magnetic circular dichroism measurements as well as first-principles calculations, in order to clarify the origin of the perpendicular magnetic anisotropy. Both experimental and theoretical results show that orbital magnetic moment of Fe is more anisotropic than that of Co with respect to the magnetization direction. The anisotropy is larger for thinner CoFeB, indicating that Fe atoms at the interface with MgO contribute more than Co to the observed perpendicular magnetic anisotropy.

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Magnetic anisotropy in Ta/CoFeB/MgO investigated by x-ray magnetic circular dichroism and first-principles calculation

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