Second order phase transitions induced by disorder in frustrated magnets

Details Second order phase transitions induced by disorder in frustrated magnets Second order phase transitions induced by disorder in frustrated magnets

2002-03-19

arxiv.org/abs/cond-mat/0203370v2

Physics

Condensed Matter

Statistical Mechanics

4 pages,1 figure

Scientific paper

We study the critical properties of three dimensional frustrated magnets, diluted with non-magnetic impurities. We show that these systems exhibit a second order phase transition, corresponding to a new universality class. In the pure case, the phase transition is expected to be weakly of first order. We therefore argue that these frustrated systems can be used to study experimentally the rounding effect of disorder on discontinuous phase transitions. We give first estimates of the critical exponents associated with this universality class, by using the method of the effective average action.

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