GdCrO3: a potential candidate for low temperature magnetic refrigeration. (4th July 2018)

• Record Type: Journal Article
• Authors: Mahana, Sudipta; Manju, U; Topwal, D
• Is Part Of: Journal of physics. Volume 51:Number 30(2018)
• Publication Date: 2018-07-04
• Subjects: magnetocaloric effect -- magnetic entropy -- magnetic refrigeration; Physics -- Periodicals; 530
• DOI: 10.1088/1361-6463/aacc98
• Languages: English
• ISSNs: 0022-3727

Abstract

Abstract: Detailed magnetic studies of polycrystalline GdCrO3 show a spectrum of interesting features, such as temperature induced magnetization reversal, spin flipping and spin reorientation, etc, which arise due to the competing magnetic interactions within and between Cr and Gd-sublattices. It also exhibits a giant magnetocaloric effect (MCE) with a maximum entropy change of 36.97 J kg −1 K −1, an adiabatic temperature change of 19.12 K and a refrigeration capacity of 542 J kg −1 for a field change of 7 T at low temperatures. Such an exceptionally large MCE arises from the suppression of the spin entropy associated with the suppression of spin reorientation transition, in addition to the Gd-ordering, which makes it one of the best candidates for magnetic refrigeration among all known potential low temperature magnetic refrigerants.