Exchange coupling in amorphous rare earth-iron alloys

Conference · Thu Jan 01 04:00:00 EST 1976 · AIP (Am. Inst. Phys.) Conf. Proc.; (United States)

OSTI ID:7345686

Heiman, N; Lee, K; Potter, R I

The technologically important amorphous rare earth (RE)-transition metal (TM) alloys provide an excellent system for investigating basic magnetic phenomena in amorphous magnetic materials. The sensitivity of the magnetic properties of the amorphous RE-TM alloys to slight compositional changes indicated the need for a rapid survey of the systematic variation of their properties. A brief review of this survey and the theoretical models is presented. One result is to point out Fe as the most favorable TM for obtaining a more detailed understanding of the magnetic properties. Data are presented from /sup 57/Fe Moessbauer effect, magnetometer and magneto-optic measurements on amorphous RE(Gd, Tb, Dy, Ho, Tm, Yb, Lu)-Fe amorphous alloy films. The Moessbauer effect results indicate that the Fe spin decreases with increasing RE content but the rate of decrease is dependent on the RE effective spin, (g - 1)J. A mean field theory model is presented which reasonably reproduces the magnetic properties of the amorphous RE--Fe alloys, and which provides useful insights into their properties. 9 figures, 30 references.

• Research Organization: IBM Research Lab., San Jose, CA
• OSTI ID: 7345686
• Conference Information: Journal Name: AIP (Am. Inst. Phys.) Conf. Proc.; (United States) Journal Volume: 29
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
AMORPHOUS STATE
DOCUMENT TYPES
FIELD THEORIES
IRON ALLOYS
MAGNETIC PROPERTIES
MOESSBAUER EFFECT
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
REVIEWS