Magnetic properties and microstructure of Fe-Pt-based alloys

Author

Thang, P.D. ; Brück, E. ; Tichelaar, F.D. ; Buschow, K.H.J. ; de Boer, F.R.

Author_Institution

Van der Waals-Zeeman Inst., Amsterdam Univ., Netherlands

Volume

38

Issue

5

fYear

2002

fDate

9/1/2002 12:00:00 AM

Firstpage

2934

Lastpage

2936

Abstract

Fe-Pt-based alloys with small amounts of Nb and Al doping were prepared by arc melting. The effects of the heat treatment and the third element on the hard-magnetic properties of the alloys were studied. We observe domains with sizes from 1 to 20 nm, depending on the thermal history. We attribute the significant remanence enhancement to an exchange coupling between nanosize single-domain particles with face-centered tetragonal structure and the fcc matrix.

Keywords

exchange interactions (electron); ferromagnetic materials; heat treatment; iron alloys; magnetic domains; nanostructured materials; platinum alloys; remanence; Al doping; Fe-Pt alloy; Fe-Pt-Al; Fe-Pt-Nb; Nb doping; arc melting; exchange coupling; face-centered tetragonal structure; hard magnetic properties; heat treatment; microstructure; nanosize single-domain particle; remanence; thermal history; Aging; Aluminum alloys; Crystallography; Iron alloys; Magnetic properties; Microstructure; Niobium alloys; Platinum alloys; Reflection; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2002.803073

Filename

1042415