Effect of chemical pressure on the magnetocaloric effect of perovskite-like RCrO3 (R-Yb, Er, Sm and Y)

• Type: Article in International Scientific Journal
• Date: 2019

Authors

Oliveira, GNP (Author) FCUP; Pires, AL (Author) Other; Machado, P (Author) Other; pereira, a. m. (Author) FCUP; araujo, j. p. (Author) FCUP; Lopes, AML (Author) Other

Journal

Title: Journal of Alloys and Compounds

Vol. 797

Pages: 269-276

ISSN: 0925-8388

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 26 Citations

Scopus - 29 Citations

Other information

Authenticus ID: P-00Q-HD5

DOI: 10.1016/j.jallcom.2019.05.011

Abstract (EN): A comparative study of the magnetocaloric effect and refrigerant capacitance properties of orthorhombic perovskite-like isostructural compounds RCrO3 (R: Yb, Er, Y and Sm) was carried out (R cations with and without a magnetic moment and different cation size). Two scales of values can be observed at the Cr3+ and R3+ ordering temperatures. A higher magnetocaloric effect near the rare earth ion ordering temperature with values ranging from - Delta S-M(T-N(Cr)) = [0.15 to 0.72] and a lower one at the Cr ordering temperature ranging from - Delta S-M(T-N(R)) = [-0.2 to 12.5]. A normal and an inverse magnetocaloric effect were observed in the low temperature regime for the case of Sm at and above the spin reorientation of the Cr ions. The evolution of -Delta S-M with R3+ ion radius increase and with total paramagnetic system moment are also discussed.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8