Magnetic Anisotropy of $\\tau$ -MnAl Thin Films

Author

Siqian Zhao ; Hozumi, Toshiya ; LeClair, Patrick ; Mankey, Gary ; Suzuki, Takao

Author_Institution

Center for Mater. for Inf. Technol., Univ. of Alabama, Tuscaloosa, AL, USA

Volume

51

Issue

11

fYear

2015

Firstpage

1

Lastpage

4

Abstract

The τ-MnAl alloy exhibits a high magnetic anisotropy energy despite the fact that both Mn and Al elements possess a low spin-orbit coupling constant. To understand the magnetic anisotropy mechanism, a systematic experimental study of the correlation between the magnetic anisotropy constant and the saturation magnetization of the τ-phase MnAl thin films has been carried out. A torque measurement has been conducted to determine a uniaxial magnetic anisotropy constant K at various temperatures from 4 to 400 K. It is found that K is linearly dependent on saturation magnetization M_s over the temperature range from 4 to 400 K. This result is at variance with the theoretical predictions.

Keywords

aluminium alloys; magnetic anisotropy; magnetic thin films; magnetisation; manganese alloys; spin-orbit interactions; τ-MnAl thin films; MnAl; saturation magnetization; spin-orbit coupling constant; temperature 4 K to 400 K; uniaxial magnetic anisotropy constant; Anisotropic magnetoresistance; Magnetic field measurement; Perpendicular magnetic anisotropy; Saturation magnetization; Temperature dependence; Temperature measurement; $tau $ -MnAl; τ-MnAl; magnetic anisotropy mechanism; saturation magnetization; torque measurements;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2015.2436059

Filename

7111354

Magnetic Anisotropy of -MnAl Thin Films

Siqian Zhao ; Hozumi, Toshiya ; LeClair, Patrick ; Mankey, Gary ; Suzuki, Takao

jour

Magnetic Anisotropy of $\\tau$ -MnAl Thin Films