The effect of chemical distribution on the magnetocaloric effect: A case study in second-order phase transition manganites

• Type: Article in International Scientific Journal
• Date: 2008

Authors

amaral, j. s. (Author) Other; tavares, p. b. (Author) Other; reis, m. s. (Author) Other; araujo, j. p. (Author) FCUP; mendonca, t. m. (Author) Other; amaral, v. s. (Author) Other; vieira, j. m. (Author) Other

Journal

Title: Journal of Non-Crystalline Solids

Vol. 354 No. 2585

Pages: 5301-5303

ISSN: 0022-3093

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 30 Citations

Scopus - 32 Citations

Other information

Authenticus ID: P-003-TKG

DOI: 10.1016/j.jnoncrysol.2008.05.078

Abstract (EN): Ferromagnetic manganites of general formula ABMnO(3) (where A is a trivalent rare-earth ion and B is a divalent dopant) are candidates for magnetic cooling applications, since they can present either second-or first-order magnetic phase transitions, and the perovskite structure allows for substantial chemical substitution and tuning of the magnetocaloric properties. The consequent chemical distribution from substitution affects the magnetic and magnetocaloric properties of the compound. The change of relative cooling power with chemical disorder is discussed by the use of the molecular mean-field model. We present experimental results of the ferromagnetic, second-order phase transition La(0.70-x)(Er, Eu)(x)Sr(0.30)MnO(3) system.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 3