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Record 5 of 386
Magnetostriction of some rare earth-aluminum Laves phase compounds
Author and Affiliation:
Pourarian, F.(Pittsburgh Univ., Pittsburgh, PA, United States)
Wallace, W. E.(Pittsburgh, University, Pittsburgh, Pa., United States)
Abstract: Measurements of the linear and volume magnetostriction of RAl2 cubic Laves compounds in which R is one of the rare earth elements Gd, Dy, Ho or Er, at temperatures between 4.2 K and the Curie temperature of each compound, are reported. Magnetic fields up to 2.5 Tesla were applied, and magnetostriction was measured using standard strain gage techniques. Saturation magnetostrictions of 17 x 10 to the -6th, -1420 x 10 to the -6th, 60 x 10 to the -6th and -920 x 10 to the -6th are determined at 4.2 K for GdAl2, DyAl2, HoAl2 and ErAl2, respectively. Large forced magnetostriction is observed in GdAl2 above the saturation field and the strain temperature dependence shows a decrease in magnitude below 40 K. A linear dependence of magnetostriction on magnetic field was observed for DyAl2 above 40 K, and the observed temperature dependence is interpreted in terms of the lowest order single-ion magnetoelastic theory. An observed decrease in the magnitude of the strain of HoAl2 below 15 K is associated with a change of the easy direction of magnetization, while in the case of ErAl2, magnetostriction is observed to occur normally up to the Curie temperature. Large volume magnetostriction is obtained for all the compounds with the exception of GdAl2.
Publication Date: Nov 01, 1979
Document ID:
19800032674
(Acquired Nov 30, 1995)
Accession Number: 80A16844
Subject Category: SOLID-STATE PHYSICS
Document Type: Journal Article
Publisher Information: United States
Contract/Grant/Task Num: NSG-3168
Financial Sponsor: NASA; United States
Organization Source: Pittsburgh Univ.; Pittsburgh, PA, United States
Description: 3p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ALUMINUM COMPOUNDS; MAGNETOSTRICTION; RARE EARTH COMPOUNDS; ANISOTROPY; CURIE TEMPERATURE; ISOTHERMS; MAGNETIZATION; TEMPERATURE DEPENDENCE; VOLUMETRIC STRAIN
Imprint And Other Notes: (Institute of Electrical and Electronics Engineers and American Institute of Physics, Joint International Magnetics Conference and Conference on Magnetism and Magnetic Materials, 2nd, New York, N.Y., July 17-20, 1979.) Journal of Applied Physics, vol. 50, Nov. 1979, pt. 2, p. 7707-7709. Research supported by the Ministry of Education of Iran;
Availability Source: Other Sources
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