Near fifty percent sodium substituted lanthanum manganites - A potential magnetic refrigerant for room temperature applications

N. Sethulakshmi, I. A. Al-Omari, K. G. Suresh, M. R. Anantharaman

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Nearly half of lanthanum sites in lanthanum manganites were substituted with monovalent ion-sodium and the compound possessed distorted orthorhombic structure. Ferromagnetic ordering at 300 K and the magnetic isotherms at different temperature ranges were analyzed for estimating magnetic entropy variation. Magnetic entropy change of 1.5 J·kg-1·K -1 was observed near 300 K. An appreciable magnetocaloric effect was also observed for a wide range of temperatures near 300 K for small magnetic field variation. Heat capacity was measured for temperatures lower than 300 K and the adiabatic temperature change increases with increase in temperature with a maximum of 0.62 K at 280 K.

Original languageEnglish
Article number092407
JournalApplied Physics Letters
Issue number9
Publication statusPublished - 2014


ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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