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Influence of the magnetic two-phase state on the magnetocaloric effect in La(1-x)SrxMnO3 manganitesстатья
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
- Авторы: Demin R.V., Koroleva L.I.
- Журнал: Physics of the Solid State
- Том: 46
- Номер: 6
- Год издания: 2004
- Издательство: Pleiades Publishing, Ltd
- Местоположение издательства: Road Town, United Kingdom
- Первая страница: 1081
- Последняя страница: 1087
- Аннотация: The magnetocaloric effect deltaTex and the magnetization in La(1-x)SrxMnO3 single crystals (x=0.1, 0.125, 0.175, 0.3) have been experimentally studied. The magnetic entropy and the magnetocaloric effect deltaTth were computed from magnetization curves. All the samples exhibited a maximum in the deltaTth(T) curve at T=Tmax. A step was observed on the deltaTex(T) curve in the region of Tmax, with the value of deltaTex on this step being substantially smaller than deltaTth. The step on the deltaTex(T)curve was followed by a maximum, which appeared at a temperature 20-40 K above Tmax. The anomalous behavior ofdeltaTex and deltaTth is assigned to the coexistence of two magnetic (ferro- and antiferromagnetic) phase in the crystal. The calculated value of deltaTth is determined primarily by the ferromagnetic part of the crystal and disregads the negative contribution from the antiferromagnetic part of the crystal to deltaTex.
- Добавил в систему: Королёва Людмила Ивановна