Low magnetic damping constant in half-metallic Co2FeAl Heusler alloy thin films grown by molecular beam epitaxy

Takayuki Hojo; Nobuki Tezuka; Takafumi Nakano; Masakiyo Tsunoda; Mikihiko Oogane

doi:10.1063/9.0000419

AIP Advances (Feb 2023)

Low magnetic damping constant in half-metallic Co2FeAl Heusler alloy thin films grown by molecular beam epitaxy

Takayuki Hojo,
Nobuki Tezuka,
Takafumi Nakano,
Masakiyo Tsunoda,
Mikihiko Oogane

Affiliations

Takayuki Hojo: Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
Nobuki Tezuka: Department of Metallurgy Science and Materials Processing, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
Takafumi Nakano: Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
Masakiyo Tsunoda: Department of Electronic Engineering, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
Mikihiko Oogane: Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan

DOI: https://doi.org/10.1063/9.0000419
Journal volume & issue: Vol. 13, no. 2
pp. 025204 – 025204-5

Abstract

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Half-metallic Co2FeAl Heusler alloy thin films with various thickness were prepared by MBE method and its magnetic and crystalline properties were investigated. At the thickness of 20 nm and above, good magnetic properties and high B2-order parameter was obtained. In addition, magnetic damping constant was evaluated from peak-to-peak linewidth measured by FMR and ultra-low magnetic damping constant below 0.001 was obtained at the film thickness of 30 nm. These results are thanks to the excellent half-metallicity in the Co2FeAl films prepared by MBE.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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