Pérez Reche, Francisco JoséTadic, BosiljkaMañosa, LluísPlanes Vila, AntoniVives i Santa-Eulàlia, Eduard2010-06-112010-06-1120040031-9007https://hdl.handle.net/2445/12836We 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.4 p.application/pdfeng(c) American Physical Society, 2004Ciència dels materialsTransformacions de fase (Física estadística)Phase transitionsMaterials scienceinfo:eu-repo/semantics/article519827info:eu-repo/semantics/openAccess