Driving rate effects in avalanche-mediated first-order phase transitions |
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Authors: | Pérez-Reche Francisco-José Tadić Bosiljka Mañosa Lluís Planes Antoni Vives Eduard |
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Affiliation: | Departament d'Estructura i Constituents de la Matèria, Universitat de Barcelona, Diagonal 647, Facultat de Física, 08028 Barcelona, Catalonia, Spain. |
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Abstract: | 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. |
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