Driving rate effects in avalanche-mediated first-order phase transitions

We study the driving-rate and temperature dependence of the power-law exponents that characterize the avalanche distribution in first-order phase transitions. Measurements of acoustic emission in structural transitions in Cu-Zn-Al and Cu-Al-Ni are presented. We show how the observed behavior emerges...

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Bibliographic Details
Published in:Physical review letters 2004-11, Vol.93 (19), p.195701.1-195701.4, Article 195701
Main Authors: PEREZ-RECHE, Francisco-José, TADIC, Bosiljka, MANOSA, Lluis, PLANES, Antoni, VIVES, Eduard
Format: Article
Language:English
Subjects:
Ciència dels materials
Condensed matter: structure, mechanical and thermal properties
Equations of state, phase equilibria, and phase transitions
Exact sciences and technology
Materials science
Phase transitions
Physics
Specific phase transitions
Transformacions de fase (Física estadística)
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Summary:We study the driving-rate and temperature dependence of the power-law exponents that characterize the avalanche distribution in first-order phase transitions. Measurements of acoustic emission in structural transitions in Cu-Zn-Al and Cu-Al-Ni are presented. We show how the observed behavior emerges within a general framework of competing time scales of avalanche relaxation, driving rate, and thermal fluctuations. We confirm our findings by numerical simulations of a prototype model.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.93.195701