Heat capacity and magnetocaloric effect in manganites (La1-yEuy)(0.7)Pb0.3MnO3 (y:0.2; 0.6)

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Тип публикации: статья из журнала

Год издания: 2010

Идентификатор DOI: 10.1016/j.jmmm.2009.10.026

Ключевые слова: Manganites, Magnetic phase transition, Heat capacity, Magnetocaloric effect, Heat capacity, Magnetic phase transition, Magnetocaloric effect, Manganites, Adiabatic calorimeters, Heat capacities, Magnetic phase transitions, Magneto-caloric effects, Magnetocaloric effect, Multi-element, Nonmagnetics, Relative cooling power, Temperature range, Europium, Lead, Manganese compounds, Oxide minerals, Specific heat, Phase transitions

Аннотация: Heat capacity and intensive magnetocaloric effect (MCE) in manganites (La1-yEuy)(0.7)Pb0.3MnO3[y=0.2; 0.6] (LEPM) were investigated by means of adiabatic calorimeter. The heat capacity anomaly as well as the values of both the intensive (Delta T-AD) and the extensive (Delta S-MCE) MCE were found to decrease upon increased replacemeПоказать полностьюnt of La with nonmagnetic Eu. However, because of widening of the MCE peaks, the LEPM compounds show the relative cooling power, RCP/Delta H, comparable to other solid solutions of manganites. Owing to strong effect of Eu -> La substitution on the Curie temperature, LEPM might have potential as the solid state refrigerants in multi-element cooling apparatus operating in a wide temperature range. (C) 2009 Elsevier B.V. All rights reserved.

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Издание

Журнал: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

Выпуск журнала: Vol. 322, Is. 6

Номера страниц: 622-627

ISSN журнала: 03048853

Место издания: AMSTERDAM

Издатель: ELSEVIER SCIENCE BV

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