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Universality in models for disorder induced phase transitions
Vives i Santa-Eulàlia, Eduard; Goicoechea, Jürgen; Ortín, Jordi, 1959-; Planes Vila, Antoni
Universitat de Barcelona
We have systematically analyzed six different reticular models with quenched disorder and no thermal fluctuations exhibiting a field-driven first-order phase transition. We have studied the nonequilibrium transition, appearing when varying the amount of disorder, characterized by the change from a discontinuous hysteresis cycle (with one or more large avalanches) to a smooth one (with only tiny avalanches). We have computed critical exponents using finite size scaling techniques and shown that they are consistent with universal values depending only on the space dimensionality d.
Física estadística
Sistemes dinàmics diferenciables
Equacions d'estat
Transformacions de fase (Física estadística)
Materials magnètics
Ciència de materials
Statistical physics
Differentiable dynamical systems
Equations of state
Phase transformations (Statistical physics)
Magnetic materials
Materials science
(c) The American Physical Society, 1995
The American Physical Society

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