PMID: 22587064May 17, 2012Paper

Inverse freezing in the Ghatak-Sherrington model with a random field

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics
C V MoraisS G Magalhaes

Abstract

The present work studies the Ghatak-Sherrington (GS) model in the presence of a magnetic random field (RF). Previous results obtained from the GS model without a RF suggest that disorder and frustration are the key ingredients to produce spontaneous inverse freezing (IF). However, in this model, the effects of disorder and frustration always appear combined. In that sense, the introduction of RF allows us to study the IF under the effects of a disorder which is not a source of frustration. The problem is solved within the one step replica symmetry approximation. The results show that the first order transition between the spin glass and the paramagnetic phases, which is related to the IF for a certain range of crystal field D, is gradually suppressed when the RF is increased.

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Citations

Jan 15, 2016·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Corrado RainoneLuca Leuzzi
Feb 13, 2016·Physical Review. E·M SchmidtF M Zimmer
May 18, 2013·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Do-Hyun Kim
Dec 12, 2012·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C F SilvaC Lacroix
Mar 4, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·C V MoraisS G Magalhaes
Oct 30, 2014·Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics·Do-Hyun Kim
Jun 18, 2021·Physical Review. E·Alexandre SilveiraS G Magalhães

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