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Magnetocaloric effect in manganites: Ferromagnetism and charge-ordering effects

Title
Magnetocaloric effect in manganites: Ferromagnetism and charge-ordering effects
Type
Article in International Scientific Journal
Year
2004
Authors
Reis, Mário Souza
(Author)
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Gomes, Angelo M S
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Araújo, João Pedro
(Author)
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Tavares, Pedro B.
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Amaral, J. S.
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Oliveira, Ivan S.
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Amaral, V. S.
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Other information
Authenticus ID: P-000-C22
Abstract (EN): A study of the magnetocaloric properties of manganites with ferromagnetic and charge-ordering states is presented. Under the application of a magnetic field in the vicinity of the paramagnetic-ferromagnetic and paramagnetic-charge order transitions large changes of the magnetic entropy are found, negative or positive, respectively. The physical mechanisms that contribute to the magnetic entropy and its temperature dependence are described and in the ferromagnetic case, discussed in terms of the Landau theory for phase transitions.
Language: English
Type (Professor's evaluation): Scientific
Contact: vamaral@fis.ua.pt
No. of pages: 5
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