Publication
Physical Review B
Paper

Random-field instability of the ferromagnetic state

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Abstract

We consider an Ising model with infinite-ranged interaction with statistically independent site fields with Gaussian distribution. The model is solved exactly and exhibits both an independent spin phase and a ferromagnetic phase, separated by a line of second-order phase transitions. We also establish that the replica technique yields exact results in the present model but not in the related random exchange system. © 1977 The American Physical Society.

Date

01 Feb 1977

Publication

Physical Review B

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