Determination of anisotropy fields in particulate recording media by Mossbauer spectroscopy

Author

Parker, F.T. ; Berkowitz, A.E.

Author_Institution

Center for Magnetic Res., California Univ., San Diego, La Jolla, CA, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3647

Lastpage

3649

Abstract

Anisotropy fields in some randomly oriented uniaxial magnetic recording materials were determined by magnetometry and the Mossbauer effect. The Mossbauer determination used the polarization parameter. Calculated values of polarization were obtained using the Stoner-Wohlfarth theory. Agreement between the two techniques was good for simpler particles. It was found that resolved Mossbauer subspectra can be used for the determination of separate site anisotropy energies if exchange coupling is sufficiently weak

Keywords

Mossbauer effect; magnetic anisotropy; magnetic properties of fine particles; magnetic recording; magnetometers; Mossbauer spectroscopy; Stoner-Wohlfarth theory; anisotropy fields; exchange coupling; magnetometry; particulate recording media; polarization parameter; randomly oriented uniaxial magnetic recording materials; site anisotropy energies; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic materials; Magnetic recording; Magnetization; Perpendicular magnetic anisotropy; Perpendicular magnetic recording; Polarization; Powders; Spectroscopy;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42388

Filename

42388