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, Adiabatic calorimeters, Heat capacities, Magnetic phase transitions, Magneto-caloric effects, 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.
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