Exchange coupled CoPd/TbCo magneto-optic storage films

Author

Gambino, R.J. ; Ruf, R.R. ; Rishi, R.

Author_Institution

IBM Thomas J. Watson Res. Center, Yorktown Heights, NY, USA

Volume

25

Issue

5

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

3749

Lastpage

3751

Abstract

Films of CoPd with weak perpendicular anisotropy have been shown to exchange couple to square loop TbCo films on both the Tb and Co sides of compensation. The exchange is sensitive to reactive impurities at the interface and is broken under conditions that produce as little as one monolayer of paramagnetic compound. Even when the coupling at the interface is strong, it is shown that only a limited thickness of the CoPd layer is spin oriented perpendicular. It is noted that the CoPd system has some potential for applications in that it has a higher Faraday rotation than TbCo at short wavelengths of interest for higher-density storage systems

Keywords

Faraday effect; cobalt alloys; exchange interactions (electron); magnetic anisotropy; magnetic thin films; magneto-optical recording; palladium alloys; terbium alloys; CoPd-TbCo exchange coupled magnetooptic storage films; Faraday rotation; interface coupling; reactive impurities; spin orientation; square loop films; weak perpendicular anisotropy; Anisotropic magnetoresistance; Coercive force; Couplings; Impurities; Magnetic materials; Magnetic properties; Material storage; Paramagnetic materials; Substrates; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.42421

Filename

42421