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

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

2004-06-04

arxiv.org/abs/cond-mat/0406098v1

Physics

Condensed Matter

Disordered Systems and Neural Networks

4 pages, 3 figures

Scientific paper

10.1103/PhysRevLett.93.195701

We have studied 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 behaviour emerges within a general framework of competing time scales of avalanche relaxation, driving rate, and thermal fluctuations. We have confirmed our findings by numerical simulations of a prototype model.

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