Enhanced magnetocaloric effect in frustrated magnets

M. E. Zhitomirsky

doi:10.1103/physrevb.67.104421

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Enhanced magnetocaloric effect in frustrated magnets

M. E. Zhitomirsky

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Abstract

The magnetothermodynamics of strongly frustrated classical Heisenberg antiferromagnets on kagome, garnet, and pyrochlore lattices is examined. The field induced adiabatic temperature change (dT/dH)_S is significantly larger for such systems compared to ordinary non-frustrated magnets and also exceeds the cooling rate of an ideal paramagnet in a wide range of fields. An enhancement of the magnetocaloric effect is related to presence of a macroscopic number of soft modes in frustrated magnets below the saturation field. Theoretical predictions are confirmed with extensive Monte Carlo simulations.

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M. E. Zhitomirsky. 2002-10-13. Enhanced magnetocaloric effect in frustrated magnets. https://doi.org/10.1103/physrevb.67.104421

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