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Cool properties of frustrated magnets : enhanced magnetocaloric effect

18/02/2014, Mike ZHITOMIRSKY (INAC, CEA-Grenoble)

The magnetocaloric effect (MCE) refers to temperature variations of a system in response to a change of an external magnetic field. The MCE is especially strong in geometrically frustrated magnets, which exhibit a residual ground state degeneracy.

I briefly survey the theoretical background and a few recent experimental studies of the MCE. Monte Carlo simulations of an adiabatic temperature drop demonstrate that frustrated magnets are promising alternative refrigerant materials for low-temperature magnetic cooling.