title: Driving rate effects in avalanche-mediated first-order phase transitions.
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.
authors.affiliation: Departament d'Estructura i Constituents de la Matèria, Universitat de Barcelona, Diagonal 647, Facultat de Física, 08028 Barcelona, Catalonia, Spain.
authors.forename: Francisco-José
authors.initials: FJ
authors.lastname: Pérez-Reche
authors.forename: Bosiljka
authors.initials: B
authors.lastname: Tadić
authors.forename: Lluís
authors.initials: L
authors.lastname: Mañosa
authors.forename: Antoni
authors.initials: A
authors.lastname: Planes
authors.forename: Eduard
authors.initials: E
authors.lastname: Vives