Magneto-optic study of the high-temperature coercivity of MnBiAl and MnBiPt films

Author

Rüdiger, U. ; Fumagalli, P. ; Roos, T. ; Holländer, B. ; Güntherodt, G.

Author_Institution

Phys. Inst., Tech. Hochschule Aachen, Germany

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3241

Lastpage

3243

Abstract

We present evidence that domain-wall pinning in MnBi films is responsible for the unusual increase of the high-temperature coercivity. The MnBi crystallite size has been reduced by depositing Bi/Mn/Al multilayers. The average diameter of the MnBi particles is smaller than the critical diameter of single-domain particles. Therefore, domain-wall pinning does not enhance the high-temperature coercivity as observed for pure MnBi films

Keywords

Kerr magneto-optical effect; aluminium alloys; bismuth alloys; coercive force; ferromagnetic materials; magnetic domain walls; magnetic hysteresis; magnetic multilayers; magneto-optical recording; manganese alloys; platinum alloys; Bi-Mn-Al; Bi/Mn/Al multilayers; MnBi; MnBi crystallite size; MnBi films; MnBiAl; MnBiPt; critical diameter; domain-wall pinning; ferromagnetic domains; high-temperature coercivity; magneto-optic study; polar Kerr hysteresis loop measurements; single-domain particles; Bismuth; Coercive force; Crystallization; Magnetic domains; Magnetic films; Magnetic materials; Magnetic multilayers; Magnetooptic recording; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617904

Filename

617904