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Title: A study of the phase transition and magnetocaloric effect in multiferroic La{sub 2}MnNiO{sub 6} single crystals

Magnetic and magnetocaloric properties of single crystal double perovskite La{sub 2}MnNiO{sub 6} have been investigated in details. Its ordered phase with a high Curie temperature (T{sub C} = 280 K) exhibits a significant refrigerant capacity around room temperature. A model based on the mean field theory approximation has been used in order to quantify the magnetic and magnetocaloric properties in the ordered La{sub 2}MnNiO{sub 6}. The magnetization and entropy changes were satisfactorily simulated as a function of temperature and magnetic field. On the other hand, the presence of cationic disorder in La{sub 2}MnNiO{sub 6} phases allows to shift the Curie point to low temperature without a significant change in the magnetocaloric performance.
Authors:
;  [1] ;  [1] ;  [2] ;  [3]
  1. Regroupement québécois sur les matériaux de pointe, Département de physique, Université de Sherbrooke, Quebec J1K 2R1 (Canada)
  2. (Canada)
  3. Institute of Solid State Physics, Bulgarian Academy of Science, Sofia 1184 (Bulgaria)
Publication Date:
OSTI Identifier:
22273473
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; APPROXIMATIONS; CAPACITY; COMPUTERIZED SIMULATION; CURIE POINT; ENTROPY; LANTHANUM COMPOUNDS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; MANGANESE COMPOUNDS; MEAN-FIELD THEORY; MONOCRYSTALS; NICKELATES; PHASE TRANSFORMATIONS; TEMPERATURE DEPENDENCE