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Title: Magnetic and magnetocaloric properties of bulk dysprosium chromite

In this work, a polycrystalline bulk DyCrO{sub 3} sample was prepared by a solution route and the structural and magnetic properties were investigated. The phase purity and ionic valence state of the DyCrO{sub 3} sample were determined by x-ray diffraction/Raman spectroscopy and x-ray photoelectron spectroscopy, respectively. The AC and DC magnetization measurements revealed the onset of antiferromagnetic order at 146 K with an effective moment of 8.88 μ{sub B}. Isothermal magnetization measurements of this material are presented for the first time, showing a peak in the coercive field at 80 K that is explained by the competition between the paramagnetic Dy{sup 3+} and Cr{sup 3+} sublattices. DyCrO{sub 3} was found to display a large magnetocaloric effect (8.4 J/kg K) and relative cooling power (217 J/kg) at 4 T applied field, which renders DyCrO{sub 3} useful for magnetic refrigeration between 5 K and 30 K.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [2]
  1. Material Science and Engineering, University of Connecticut, Storrs, Connecticut 06269 (United States)
  2. (United States)
  3. Department of Physics, University of Connecticut, Storrs, Connecticut 06269 (United States)
  4. Institute of Material Science, University of Connecticut, Storrs, Connecticut 06269 (United States)
Publication Date:
OSTI Identifier:
22218006
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 114; Journal Issue: 11; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ADIABATIC DEMAGNETIZATION; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; CHROMIUM IONS; COERCIVE FORCE; DYSPROSIUM; DYSPROSIUM COMPOUNDS; DYSPROSIUM IONS; MAGNETIC PROPERTIES; MAGNETIZATION; PARAMAGNETISM; POLYCRYSTALS; RAMAN SPECTRA; RAMAN SPECTROSCOPY; REFRIGERATION; THERMODYNAMIC PROPERTIES; X-RAY DIFFRACTION; X-RAY PHOTOELECTRON SPECTROSCOPY