Сибирский федеральный университет

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 replacement 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

• Kartashev A.V. (L.V. Kirensky Institute,Physics SB RAS)
• Flerov I.N. (Siberian Federal University)
• Volkov N.V. (Siberian Federal University)
• Sablina K.A. (L.V. Kirensky Institute,Physics SB RAS)

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