Coercivity of a macroscopic ferrimagnet near a compensation point

Author

Webb, D.J. ; Marshall, A.F. ; Sun, Z. ; Geballe, T.H. ; White, Robert M.

Author_Institution

Center for Mater. Res., Stanford Univ., CA, USA

Volume

24

Issue

1

fYear

1988

fDate

1/1/1988 12:00:00 AM

Firstpage

588

Lastpage

592

Abstract

A ferrimagnet that does not have the opposing magnetic components in a unit cell of atomic dimensions is termed a macroscopic ferrimagnet. It is shown that the temperature dependence of the coercive field of such a magnet seems very different from that of a homogeneous ferrimagnet in that it decreases as T approaches the compensation temperature. This is understood to be the result of a weak magnetic coupling at the interface between the opposing components. This leads to an enhanced high-field susceptibility near the compensation temperature, which eventually controls the apparent coercive field. These suggestions are born out by a simple molecular field calculation

Keywords

coercive force; ferrimagnetism; coercive field; coercivity; compensation point; compensation temperature; high-field susceptibility; macroscopic ferrimagnet; molecular field calculation; temperature dependence; weak magnetic coupling; Amorphous magnetic materials; Amorphous materials; Antiferromagnetic materials; Coercive force; Ferrimagnetic films; Ferrimagnetic materials; Helium; Inorganic materials; Substrates; Sun; Temperature; Temperature control; Temperature dependence;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.43988

Filename

43988