REENTRANT BEHAVIOR IN A RANDOM ANISOTROPY MAGNET

Citation
Ri. Bewley et R. Cywinski, REENTRANT BEHAVIOR IN A RANDOM ANISOTROPY MAGNET, Journal of magnetism and magnetic materials, 144, 1995, pp. 1039-1040
Citations number
6
Categorie Soggetti
Material Science","Physics, Condensed Matter
ISSN journal
03048853
Volume
144
Year of publication
1995
Part
2
Pages
1039 - 1040
Database
ISI
SICI code
0304-8853(1995)144:<1039:RBIARA>2.0.ZU;2-O
Abstract
Amorphous Gd7-xDyxNi3 is a model random anisotropy system in which the exchange J can be varied whilst maintaining a constant single ion ani sotropy D. Investigation of the magnetic phase diagram as x, and hence D/J, increases reveals a re-entrant transition from correlated sperom agnet to speromagnet for x < 4, while for x > 4 the paramagnetic-spero magnetic transition is direct. A multicritical point is observed at x = 4, at which the exponent gamma increases suddenly from 1.35 to 2.