Magnetooptical properties of ferrimagnetic CoCr2S4in the near infrared

Author

Ahrenkiel, Richard K. ; Coburn, Theodore J. ; Carnall, Edward

Author_Institution

Eastman Kodak Company, Rochester, N.Y.

Volume

10

Issue

1

fYear

1974

fDate

3/1/1974 12:00:00 AM

Firstpage

2

Lastpage

7

Abstract

CoCr2S4, which is a ferrimagnetic insulator, has been prepared by hot-pressing microcrystalline powder. The infrared magneto-reflectance effects have been measured at several temperatures below the transition temperature of 221K. Very large Kerr effects, which are centered at 1.0 and 1.7 μm, have been associated with the principal crystal field transitions of divalent cobalt. These samples exhibit a normal remanence of at least 95 percent, which is attributed to strain-induced anisotropy in the sample. The transmission and Faraday rotation of the material are deduced from Kramers-Kronig and other analysis of the reflectance data. The use of this material in a digital-storage application is discussed

Keywords

Cobalt chromium sulfide; Magnetooptic effects; Magnetooptic memories; Crystalline materials; Ferrimagnetic materials; Insulation; Magnetic anisotropy; Magnetic field measurement; Magnetic properties; Magnetooptic effects; Perpendicular magnetic anisotropy; Powders; Temperature measurement;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1974.1058280

Filename

1058280