Title :
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
fDate :
9/1/2002 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
DOI :
10.1109/TMAG.2002.803073
