Magneto-optic properties of macroscopic ferrimagnets

Author

Gambino, Richard J. ; Fumagalli, Paul

Author_Institution

Dept. of Mater. Sci. & Eng., State Univ. of New York, Stony Brook, NY, USA

Volume

30

Issue

6

fYear

1994

fDate

11/1/1994 12:00:00 AM

Firstpage

4461

Lastpage

4463

Abstract

A new class of two phased materials, called macroscopic ferrimagnets, displays many properties associated with ferrimagnetism including magnetic compensation points. A typical material system which shows this phenomenon is cobalt containing ≅100 Å precipitates of EuS. The negative exchange in these systems is relatively weak so the remanent magneto-optic properties show the ferrimagnetic state, but at fields above 2 to 3 T, alignment of both the Co and EuS with the field can occur. In addition to the usual magnetic compensation point at which the sign of the magneto-optic loop reverses, we observe a second, magneto-optic, compensation point which occurs when the Kerr rotation of the two phases are equal and opposite

Keywords

Kerr magneto-optical effect; cobalt; europium compounds; exchange interactions (electron); ferrimagnetic materials; magnetic hysteresis; magnetisation reversal; 100 A; Co:EuS; Kerr rotation; macroscopic ferrimagnets; magnetic compensation point; magnetic compensation points; magneto-optic loop reverse; magneto-optic properties; negative exchange; remanent magneto-optic properties; two phased materials; Antiferromagnetic materials; Ferrimagnetic materials; Magnetic anisotropy; Magnetic materials; Magnetic properties; Magnetic separation; Perpendicular magnetic anisotropy; Substrates; Superconducting magnets; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.334121

Filename

334121