| Issue |
Europhys. Lett.
Volume 51, Number 4, August II 2000
|
|
|---|---|---|
| Page(s) | 441 - 446 | |
| Section | Condensed matter: electronic structure, electrical, magnetic, and optical properties | |
| DOI | https://doi.org/10.1209/epl/i2000-00502-1 | |
| Published online | 01 September 2002 | |
Evidence for dipolar effects in re-entrant amorphous ferromagnets
School of Physics, University of Hyderabad -
Central University P.O. Hyderabad 500 046, Andhra Pradesh, India
Corresponding author: kaulsp@uohyd.ernet.in
Received:
29
March
2000
Accepted:
16
June
2000
Comprehensive high-resolution magnetic susceptibility measurements on amorphous ferromagnets, which either do or do not exhibit re-entrant behavior at low temperatures, for the first time, clearly bring out the importance of isotropic dipolar interactions in establishing long-range ferromagnetic order in re-entrant amorphous ferromagnets and offer a possible way of solving the long-standing re-entrant spin-glass paradox by convincingly explaining why the ferromagnetic state possesses larger entropy than the re-entrant spin-glass state in such systems.
PACS: 75.40.Cx – Static properties (order parameter, static susceptibility, heat capacities, critical exponents, etc.) / 75.50.Lk – Spin glasses and other random magnets / 75.50.Kj – Amorphous and nanocrystalline magnetic materials; quasicrystals
© EDP Sciences, 2000
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