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Title: 3d-4f spin interaction and field-induced metamagnetism in RCrO{sub 4} (R = Ho, Gd, Lu) compounds

We observe that the zircon-type RCrO{sub 4} (R = Ho, Gd, Lu) compounds exhibit complicated magnetic properties and large magnetic entropy change due to the strong competition between ferromagnetic and antiferromagnetic interactions. For a field change of 7 T, the maximum values of entropy change and refrigerant capacity reach 28 J kg{sup −1} K{sup −1} and 740 J kg{sup −1}, respectively, for GdCrO{sub 4} whereas the corresponding values for HoCrO{sub 4} are 29 J kg{sup −1} K{sup −1} and 550 J kg{sup −1}. For GdCrO{sub 4} compound, the magnetic entropy change is quite large even at low temperatures well below the ferromagnetic transition.
Authors:
; ; ;  [1]
  1. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700 064 (India)
Publication Date:
OSTI Identifier:
22273903
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; 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; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; CHROMATES; ENTROPY; FERROMAGNETIC MATERIALS; FERROMAGNETISM; GADOLINIUM COMPOUNDS; HOLMIUM COMPOUNDS; LUTETIUM COMPOUNDS; MAGNETIC PROPERTIES; PHASE TRANSFORMATIONS; SPIN; TEMPERATURE DEPENDENCE