Diluted Random Fields in Mixed Cyanide Crystals

Details Diluted Random Fields in Mixed Cyanide Crystals Diluted Random Fields in Mixed Cyanide Crystals

1997-02-13

arxiv.org/abs/cond-mat/9702133v1

Europhys. Lett. 37 (1997) 615-619

Physics

Condensed Matter

Disordered Systems and Neural Networks

8 pages, latex

Scientific paper

10.1209/epl/i1997-00199-0

A percolation argument and a dilute compressible random field Ising model are used to present a simple model for mixed cyanide crystals. The model reproduces quantitatively several features of the phase diagrams altough some crude approximations are made. In particular critical thresholds x_c at which ferroelastic first order transitions disappear, are calculated. Moreover, transitions are found to remain first order down to x_c for all mixtures except for bromine, for which the transition becomes continuous. All the results are in full agreement with experimental data.

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