REVERSIBLE AND NON REVERSIBLE MAGNETOCALORIC EFFECT IN PHASE SEPARATED MANGANITES

MARIANO QUINTERO; DANIEL GARCIA REPARAZ; DAFNE GOIJMAN; IGNACIO IRUZUN; SEBASTIÁN PASSANANTE; ANA GABRIELA LEYVA; JOAQUIN SACANELL

Conferencia; Seventh IIF-IIR International Conference on Magnetic Refrigeration at Room Temperature, Thermag VII; 2016

In this work we present a study of the magnetocaloric effect in phase separated manganites, whichdisplay the intrinsic coexistence of ferromagnetic and non-ferromagnetic phases. In particular, wefocus on the influence of phase separation on the magnitude of the effect, analysing the adiabaticchange of temperature and the isothermal change of enthalpy, obtained by direct and indirectmethods, respectively. Our results show a superposition of reversible and non-reversible processesduring magnetic field induced transitions. We further present a model which is in well agreementwith the experimental data.