Elastic constants of praseodymium single crystals in the temperature range 4.2–300 K

Journal Article · Sat Sep 01 04:00:00 EDT 1973 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.1662863· OSTI ID:4419910

Greiner, J. D.

The elastic constants of single crystals of double hcp allotrope of praseodymium have been measured over the temperature range 4.2-300 K. Maxima are observed near 100 K in the temperature dependences of C₁₁, C₃₃, and (C₁₁ - C₁₂)/2-, and minima are observed ne ar 30 K. The maxima correlate with the upper temperature limit of an anomalous contribution wich has been reported in the heat capacity. The minima correlate with peculiar behavior which has been observed in other physical phenomena. Inference may be drawn from the elasticity data that the thermal expansion behavior of praseodymium at low temperatures is very highly anisotropic. Comparison of thc elastic constants of praseedymium with available data for the other rare earths shows that the praseodymium data fit a general pattern. Evaluation from the elastic constants shows that the Debye temperature of praseodymium remains nearly constant throughout the temperature range of measurement within plus or minus 2 K of 152 K. (auth)

• Research Organization: Ames Laboratory, U.S. Atomic Energy Commission and Department of Metallurgy, Iowa State University, Ames, Iowa 50010
• Sponsoring Organization: USDOE
• NSA Number: NSA-29-003056
• OSTI ID: 4419910
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 9 Vol. 44; ISSN JAPIAU; ISSN 0021-8979
• Publisher: American Institute of Physics (AIP)
• Country of Publication: United States
• Language: English

Related Subjects

*PRASEODYMIUM-- ELASTICITY
DEBYE TEMPERATURE
MONOCRYSTALS
N50230* --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
SHEAR
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
ULTRASONIC WAVES
YOUNG MODULUS