Volume 50, Number 2, April II 2000
|Page(s)||264 - 270|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 September 2002|
Random-field and glassy dynamics in a diluted Ising antiferromagnet:
Departamento de Física, Universidad Nacional de Colombia
A.A. 127, Manizales, Colombia
2 Departamento de Física, Universidade Federal de Pernambuco 50670-901, Recife, PE, Brasil
Accepted: 10 February 2000
The random-field Ising model (RFIM) system is studied by magnetization and dynamic susceptibility measurements, under finite dc applied fields (H). For , the magnetic behaviour is compatible with a long-range ordered (LRO) antiferromagnetic (AF) ground state, which undergoes a phase transition (PT) at a critical temperature . For higher H, the LRO configuration becomes unstable and the PT is destroyed. A glassy dynamics emerges in the upper part of the (H,T) phase diagram. Our results reconcile earlier concepts associated with the weak RFIM problem with recent experimental data in .
PACS: 75.50.Lk – Spin glasses and other random magnets / 75.40.Gb – Dynamic properties (dynamic susceptibility, spin waves, spin diffusion, dynamic scaling, etc.) / 75.30.Kz – Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
© EDP Sciences, 2000
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.