Recent topics on metastability, hysteresis, avalanches, and acoustic emission associated to martensitic transitions in functional materials

Abstract

We review some results for the dynamics of first-order phase transitions in functional materials. We especially focus on simple models of athermal evolution in driven ferromagnets that give a global picture of metastability and hysteresis, showing that first-order phase transitions in such systems proceed by avalanches. Within this theoretical framework, we then discuss recent experiments on acoustic emission avalanches in structural phase transitions.

24 pages, 11 figures, intended as a chapter in book "Disorder and Strain induced complexity in functional materials" (This version includes the missing figures)

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