Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 459, Issue 1-2, Pages 51-54Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2007.05.022
Keywords
magnetocaloric effect; phase transition; oxide materials
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The magnetocaloric effect (MCE) in 4d itinerant ferromagnet SrRuO3 prepared by conventional ceramic processing has been investigated using superconducting quantum interference device (SQUID). SrRuO3 material exhibits magnetic entropy change Delta S-M = -2.5 J/kg K and adiabatic temperature change Delta T-ad = 3.1 K at an applied field of 6.5 T and near Curie temperature (similar to 160 K). Based on the analysis of Debye approximation, the lattice entropy change reaches Delta S-L = 0.34 J/kg K and is 12% of total entropy changes. The present work demonstrates the importance of the lattice entropy change in SrRuO3 material with second-order phase transition since the large change in lattice volume exhibits near Curie temperature. (C) 2007 Elsevier B.V. All rights reserved.
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