Novel Disordering Mechanism in Ferromagnetic Systems with Competing Interactions
METADATA ONLY
Loading...
Author / Producer
Date
2013-10-25
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
METADATA ONLY
Data
Rights / License
Abstract
Ferromagnetic Ising systems with competing interactions are considered in the presence of a random field. We find that in three space dimensions the ferromagnetic phase is disordered by a random field which is considerably smaller than the typical interaction strength between the spins. This is the result of a novel disordering mechanism triggered by an underlying spin-glass phase. Calculations for the specific case of the long-range dipolar LiHo xY1-xF4 compound suggest that the above mechanism is responsible for the peculiar dependence of the critical temperature on the strength of the random field and the broadening of the susceptibility peaks as temperature is decreased, as found in recent experiments by Silevitch et al... Our results thus emphasize the need to go beyond the standard Imry-Ma argument when studying general random-field systems. © 2013 American Physical Society.
Permanent link
Publication status
published
Editor
Book title
Journal / series
Volume
111 (17)
Pages / Article No.
177202
Publisher
American Physical Society