Temperature-dependent structural and magnetic properties of R2MMnO6 double perovskites (R=Dy, Gd; M=Ni, Co)
Journal article, 2018
The structural and magnetic properties of the Dy2CoMnO6, Dy2NiMnO6 and Gd2CoMnO6 double perovskites are investigated using X-ray powder diffraction and squid magnetometry. The materials adopt an orthorhombic structure (space ground Pnma) with disordered Co(Ni)/Mn cations, and exhibit ferrimagnetic transitions near T(C)85, 95, and 115K respectively. T-C was found to monotonously depend on the orthorhombic distortion (a-c)/(a+c) of the compounds. The crystal structure of the compounds was investigated as a function of temperature (16-1100K range), evidencing changes in the BO6 octahedron near T-C. The magnetic entropy changes are estimated for comparison of the magnetocaloric properties to those from literature.
Author
S. A. Ivanov
Uppsala University
Karpov Institute of Physical Chemistry
Mattias Andersson
Chalmers, Chemistry and Chemical Engineering, Applied Chemistry
J. Cedervall
Uppsala University
E. Lewin
Uppsala University
M. Sahlberg
Uppsala University
G. V. Bazuev
Russian Academy of Sciences
P. Nordblad
Uppsala University
R. Mathieu
Uppsala University
Journal of Materials Science: Materials in Electronics
0957-4522 (ISSN) 1573-482X (eISSN)
Vol. 29 21 18581-18592Subject Categories
Inorganic Chemistry
Materials Chemistry
Condensed Matter Physics
DOI
10.1007/s10854-018-9976-1