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

Journal Article · Thu May 07 00:00:00 EDT 2015 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4906431· OSTI ID:22409998

Gschneidner, K. A.; Pecharsky, V. K. ^[1]

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1. The Ames Laboratory, U.S. Department of Energy, Iowa State University, Ames, Iowa 50011-3020 (United States)

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.

• OSTI ID: 22409998
• Journal Information: Journal of Applied Physics, Vol. 117, Issue 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

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