|
authors |
Reis, MS; Gomes, AM; Araujo, JP; Tavares, PB; Oliveira, IS; Amaral, VS |
|
nationality |
International |
|
journal |
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS |
|
author keywords |
magnetocaloric effect; manganite; charge order; Pr1-xCaxMnO3 |
|
abstract |
The magnetocaloric effect (DeltaS(M)) is studied across the ferromagnetic to charge ordered composition range in Pr1-xCaxMnO3 manganites (0.25 less than or equal to x less than or equal to 0.40). The ferromagnetic phase transition leads to usual entropy decrease on the application of a magnetic field. The charge order transition (T-CO similar to 220-250 K) leads to an uncommon entropy increase, of comparable magnitude (4 J kg(-1) K-1 for 40 kOe). At lower temperatures (T < 50K), close to the field-induced mixed phase, extremely large values of DeltaS(M) are found (for x = 0.32, -20.8 J kg(-1) K-1 for 40 kOe at 26 K). (C) 2003 Elsevier B.V. All rights reserved. |
|
publisher |
ELSEVIER SCIENCE BV |
|
issn |
0304-8853 |
|
year published |
2004 |
|
volume |
272 |
|
beginning page |
2393 |
|
ending page |
2394 |
|
digital object identifier (doi) |
10.1016/j.jmmm.2003.12.650 |
|
web of science category |
Materials Science, Multidisciplinary; Physics, Condensed Matter |
|
subject category |
Materials Science; Physics |
|
unique article identifier |
WOS:000222236800316
|
