Phys. Rev. B 67, 104421 (2003) [7 pages]Enhanced magnetocaloric effect in frustrated magnetsReceived 13 October 2002; revised 13 January 2003; published 21 March 2003 The magnetothermodynamics of strongly frustrated classical Heisenberg antiferromagnets on kagome, garnet, and pyrochlore lattices is examined. The field induced adiabatic temperature change (∂T/∂H)S is significantly larger for such systems compared to ordinary nonfrustrated 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 the presence of a macroscopic number of soft modes in frustrated magnets below the saturation field. Theoretical predictions are confirmed with extensive Monte Carlo simulations. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.67.104421
DOI:
10.1103/PhysRevB.67.104421
PACS:
75.30.Sg, 75.10.Hk, 75.50.Ee
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