The Magnetocaloric Effect

The MCE is exhibited by a number of perovskite oxides, especially La Ca jMnOj and Lag SrgjMnOj. The phase Lag CagjMnOj is ferromagnetic below a Curie temperature of approximately 220 K and LaQ Sr MnOj below a of approximately 370 K, making them potential magnetocaloric materials, but unfortunately 

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Tishin, A.M. and Spichkin, Y.I. (2003) The Magnetocaloric Effect and its Applications, Taylor Francis Group, London. 

III.1 The magnetocaloric effect Scientific American, May 1998, p. 44) relies on the ability of a ferromagnetic material to heat up in the presence of a magnetic field and then cool down once the field is removed. When a ferromagnet is... 

Recently, a new liquefaction approach based on the magnetocaloric effect has been proposed [115]. The method is based on the characteristics of some magnetic materials that heat up when placed in a magnetic held and cool down when removed from it. The magnetic refrigeration can develop its potentialities in terms of overall efficiency for liquefaction process, as it is theoretically able to exploit... 

Sharpataya et al. [37] measured the heat capacity of caesium hexafluoroarsenate in the temperature range 300-850 K and detected a solid-solid transformation from the rhombohedral to cubic phase, occurring in ftie range 235-360 K. The transition has been interpreted as an order-disorder type, and its enthalpy and entropy have been determined. The magnetocaloric effect has been discussed by Kalva and Sestak [38], who proposed ftie use of a quasi-particle formalism to model it. 

The Mean-Field Theory in the Study of Ferromagnets and the Magnetocaloric Effect... 

The magnetocaloric effect in first-order magnetic phase transitions... 

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