Enhanced magnetocaloric effect in frustrated magnets
Abstract
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.
- Publication:
-
Physical Review B
- Pub Date:
- March 2003
- DOI:
- arXiv:
- arXiv:cond-mat/0210288
- Bibcode:
- 2003PhRvB..67j4421Z
- Keywords:
-
- 75.30.Sg;
- 75.10.Hk;
- 75.50.Ee;
- Magnetocaloric effect magnetic cooling;
- Classical spin models;
- Antiferromagnetics;
- Condensed Matter - Strongly Correlated Electrons;
- Condensed Matter - Disordered Systems and Neural Networks;
- Condensed Matter - Statistical Mechanics
- E-Print:
- 7 pages