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: email@example.com
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