Variation of T_g with magnetic field in a magnetic glass

2009/04/17 by Archana Lakhani, Lakhani, Archana, Pallavi Kushwaha +11
Physics and Astronomy · #FOS: Physical sciences #Statistical Mechanics (cond-mat.stat-mech) #Strongly Correlated Electrons (cond-mat.str-el) #Theoretical and Computational Physics #cond-mat.stat-mech #cond-mat.str-el

paper · pdf · doi:10.48550/arxiv.0904.2635

arxiv created 2009/04/17 · openalex publication_date 2009/04/17 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Glass-like arrest has recently been reported in various magnetic materials. As in structural glasses, the kinetics of a first-order transformation is arrested while retaining the higher-entropy phase as a non-ergodic state. We show visual mesoscopic evidence of the irreversible devitrification of the arrested antiferromagnetic-insulating phase in Pr_0.5Ca_0.5Mn_0.975Al_0.025O₃ to its equilibrium ferromagnetic-metallic phase with isothermal increase of magnetic field, similar to its iso-field devitrification on warming. The slope of T_g vs magnetic field in half-doped manganites is shown to have a sign governed by Le Chatelier's Principle.

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