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Title: The structural and magnetic properties of Pr{sub 1−x}Er{sub x}Al{sub 2}

We report on the effect of Er addition to PrAl{sub 2} on the lattice parameters, magnetic behavior, heat capacity, and magnetocaloric effect by using x-ray diffraction, magnetization, and heat capacity measurements. Unlike Pr{sub 0.6}Er{sub 0.4}Al{sub 2}, other alloys we studied in the pseudobinary (Pr{sub 1−x}Er{sub x})Al{sub 2} system do not exhibit a sharp peak in heat capacity with the application of magnetic field. Both the cubic lattice parameter and the Curie temperature decrease with increasing Er concentration. The nuclear specific heat coefficient decreases from 660 mJ K mol{sup −1} for x = 0.05 to a nearly negligible value for x = 0.95. The magnetic entropy and adiabatic temperature change varies from 2 to 4 J mol{sup −1} K{sup −1} and 2.5 to 5 K at ΔH = 20 kOe for x = 0.05 to 0.95, respectively. These values of the magnetocaloric effect are comparable to those of the other rare-earth dialuminides systems.
Authors:
 [1] ; ;  [1] ;  [2]
  1. The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020 (United States)
  2. (United States)
Publication Date:
OSTI Identifier:
22409998
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 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; ALUMINIUM ALLOYS; COMPARATIVE EVALUATIONS; CONCENTRATION RATIO; CUBIC LATTICES; CURIE POINT; ENTROPY; ERBIUM ALLOYS; LATTICE PARAMETERS; MAGNETIC FIELDS; MAGNETIC PROPERTIES; MAGNETIZATION; NUCLEAR SPECIFIC HEAT; PRASEODYMIUM ALLOYS; X-RAY DIFFRACTION