Magnetocaloric effect in manganites: Ferromagnetism and charge-ordering effects
authors Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Amaral, JS; Oliveira, IS; Amaral, VS
editors Martins, R; Fortunato, E; Ferreira, I; Dias, C
nationality International
journal ADVANCED MATERIALS FORUM II
author keywords magnetocaloric effect; ferromagnetism; charge ordering
keywords PHASE
abstract 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.
publisher TRANS TECH PUBLICATIONS LTD
issn 0255-5476
isbn 0-87849-941-5
year published 2004
volume 455-456
beginning page 148
ending page 152
web of science category Materials Science, Multidisciplinary
subject category Materials Science
unique article identifier WOS:000222018500032
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