Journal
MATERIALS LETTERS
Volume 45, Issue 2, Pages 91-94Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0167-577X(00)00082-3
Keywords
large magnetocaloric effect; La0.75SrxCa0.25-xMnO3; adiabatic temperature change; magnetic entropy change; perovskite-type; calorimetric system
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Single phase perovskite-type La0.75SrxCa0.25-xMnO3 powder and ceramic were prepared by the sol-gel technique. The large magnetocaloric effects near room temperature in this type of materials were measured by a sensitive calorimetric system. The results indicated that the maximum adiabatic temperature changes of La0.75Sr0.075Ca0.175MnO3 and La0.75Sr0.1Ca0.15MnO3 produced by a magnetic field change of 1.4 Tesla are 0.78 K and 0.49 K, respectively. (C) 2000 Elsevier Science B.V. All rights reserved.
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