High-anisotropy nanocomposite films for magnetic recording

Author

Sellimyer, D.J. ; Luo, C.P. ; Yan, M.L. ; Liu, Y.

Author_Institution

Behlen Lab. of Phys., Nebraska Univ., Lincoln, NE, USA

Volume

37

Issue

4

fYear

2001

fDate

7/1/2001 12:00:00 AM

Firstpage

1286

Lastpage

1291

Abstract

This paper presents results on the synthesis and properties of FePt- and CoPt-based high-anisotropy nanocomposite films. These films consist of high anisotropy L1₀ CoPt or FePt particles embedded in a nonmagnetic matrix such as C, SiO₂, or B₂O₃. The grain size and magnetic properties of these films ran he controlled by the processing temperatures and the film compositions. Particularly in the FePt:B₂O₃ films the c-axes of the FePt grains can be made to align along the film normal direction, resulting in films with perpendicular anisotropy. Temperature-dependence of magnetic properties and activation volumes are investigated to understand the magnetization reversal and thermal-activation effects. The potential of these films as high-density recording media is discussed

Keywords

cobalt alloys; composite materials; grain size; iron alloys; magnetic particles; magnetic recording; magnetic thin films; magnetisation reversal; nanostructured materials; perpendicular magnetic anisotropy; platinum alloys; B₂O₃; C; CoPt; CoPt particles; FePt; FePt particles; SiO₂; activation volume; grain size; magnetic properties; magnetic recording; magnetization reversal; nanocomposite film; perpendicular anisotropy; temperature dependence; thermal activation; Anisotropic magnetoresistance; Grain size; Magnetic films; Magnetic properties; Magnetic recording; Magnetization reversal; Process control; Radio access networks; Size control; Temperature control;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.950820

Filename

950820