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Title: Avalanches in a fluctuationless first-order phase transition in a random-bond Ising model
Author: Vives i Santa-Eulàlia, Eduard
Planes Vila, Antoni
Keywords: Superfícies (Física)
Transformacions de fase (Física estadística)
Model d'Ising
Surfaces (Physics)
Phase transformations (Statistical physics)
Ising model
Issue Date: 1994
Publisher: The American Physical Society
Abstract: We study the behavior of the random-bond Ising model at zero temperature by numerical simulations for a variable amount of disorder. The model is an example of systems exhibiting a fluctuationless first-order phase transition similar to some field-induced phase transitions in ferromagnetic systems and the martensitic phase transition appearing in a number of metallic alloys. We focus on the study of the hysteresis cycles appearing when the external field is swept from positive to negative values. By using a finite-size scaling hypothesis, we analyze the disorder-induced phase transition between the phase exhibiting a discontinuity in the hysteresis cycle and the phase with the continuous hysteresis cycle. Critical exponents characterizing the transition are obtained. We also analyze the size and duration distributions of the magnetization jumps (avalanches).
Note: Reproducció digital del document publicat en format paper, proporcionada per PROLA i
It is part of: Physical Review B, 1994, vol. 50, núm. 6, p. 3839-3848.
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ISSN: 0163-1829
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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