Magnetocaloric study of monovalent-doped manganites Pr0.6Sr0.4-xNaxMnO3 (x = 0-0.2)
Rachid Thaljaoui , W. Boujelben , Krystyna Pękała , M. Pekała , W. Cheikhrouhou-Koubaa , A. Cheikhrouhou
AbstractA systematic investigation of structural, magnetic, and magnetocaloric properties is reported for a series of monovalent sodium-doped manganites Pr0.6Sr0.4-xNaxMnO3 (x = 0, 0.05, 0.1, 0.15, and 0.2). Rietveld refinements of the X-ray diffraction patterns show that all powder samples are single-phased and crystallized in the orthorhombic structure with Pnma space group. Magnetic characterization and Arrott plot confirm the second-order phase transition at Curie temperature TC decreasing from 310 K for x = 0 down to 272 K for x = 0.2. Magnetic entropy change is largest for x = 0 reaching 1.95 J kg-1 K-1 at 2 T field. This corresponds to a large relative cooling power of 102 J kg-1 . Magnetic field sensitivity of magnetic entropy change and relative cooling power are analyzed and discussed. © 2013 Springer Science+Business Media New York.
|Journal series||Journal of Materials Science, ISSN 0022-2461|
|Keywords in English||Perovskite manganites, Magnetic properties, Magnetocaloric effect, Transport properties|
|ASJC Classification||; ;|
|Score|| = 30.0, 01-02-2020, ArticleFromJournal|
= 30.0, 01-02-2020, ArticleFromJournal
|Publication indicators||= 24; : 2013 = 1.446; : 2013 = 2.305 (2) - 2013=2.303 (5)|
|Citation count*||5 (2015-01-02)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.