Signs of anisotropic magnetoresistance in Co2MnGa Heusler alloy epitaxial thin films based on current direction

Takashi Sato; Satoshi Kokado; Masahito Tsujikawa; Tomoyuki Ogawa; Satoru Kosaka; Masafumi Shirai; Masakiyo Tsunoda

doi:10.7567/1882-0786/ab42b4

Signs of anisotropic magnetoresistance in Co₂MnGa Heusler alloy epitaxial thin films based on current direction

Takashi Sato, Satoshi Kokado, Masahito Tsujikawa, Tomoyuki Ogawa, Satoru Kosaka, Masafumi Shirai, Masakiyo Tsunoda

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

6 Citations (Scopus)

Abstract

Anisotropic magnetoresistance (AMR) effects in Co_x(Mn_0.44Ga_0.56)_100-x epitaxial thin films were investigated in the temperature range of 5-300 K by changing the current (I) direction to the crystal axis and the Co content (x). The AMR ratios were mostly positive for I // Co₂MnGa[100] and negative for I // Co₂MnGa[110] and showed peak values at x = 49.7 at% for both current directions. AMR ratios calculated from s-d scattering theory, including crystal field effects with density of states information from first-principles calculations, well reproduced experimental features.

Original language	English
Article number	103005
Journal	Applied Physics Express
Volume	12
Issue number	10
DOIs	https://doi.org/10.7567/1882-0786/ab42b4
Publication status	Published - 2019 Oct 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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Signs of anisotropic magnetoresistance in Co₂MnGa Heusler alloy epitaxial thin films based on current direction. / Sato, Takashi; Kokado, Satoshi; Tsujikawa, Masahito ; Ogawa, Tomoyuki; Kosaka, Satoru; Shirai, Masafumi ; Tsunoda, Masakiyo.

In: Applied Physics Express, Vol. 12, No. 10, 103005, 01.10.2019.

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

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abstract = "Anisotropic magnetoresistance (AMR) effects in Cox(Mn0.44Ga0.56)100-x epitaxial thin films were investigated in the temperature range of 5-300 K by changing the current (I) direction to the crystal axis and the Co content (x). The AMR ratios were mostly positive for I // Co2MnGa[100] and negative for I // Co2MnGa[110] and showed peak values at x = 49.7 at% for both current directions. AMR ratios calculated from s-d scattering theory, including crystal field effects with density of states information from first-principles calculations, well reproduced experimental features.",

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AU - Sato, Takashi

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AU - Ogawa, Tomoyuki

AU - Kosaka, Satoru

AU - Shirai, Masafumi

AU - Tsunoda, Masakiyo

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Signs of anisotropic magnetoresistance in Co₂MnGa Heusler alloy epitaxial thin films based on current direction

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