Elastic Moduli and Ultrasonic Attenuation of Polycrystalline Europium from 4.2 to 300°K

M. Rosen

doi:10.1103/PhysRev.166.561

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Elastic Moduli and Ultrasonic Attenuation of Polycrystalline Europium from 4.2 to 300°K

M. Rosen

Atomic Energy Commission, Nuclear Research Center, Negev, Beer-Sheva, Israel

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Phys. Rev. 166, 561 – Published 10 February, 1968

DOI: https://doi.org/10.1103/PhysRev.166.561

Abstract

The longitudinal and transverse acoustic velocities and the ultrasonic attenuation of high-purity polycrystalline europium metal have been measured by a pulse technique between 4.2 and 300°K. The variations with temperature of the Young modulus $E$ , shear modulus $G$ , adiabatic compressibility $K_{s}$ , and Debye temperature $Θ_{D}$ , have been determined. The Néel point at 91°K is marked by drastic changes in the elastic moduli and ultrasonic attenuations. Anomalies in the attenuation and in the compressibility are observed at about 150°K. The limiting value of $Θ_{D}$ is 117°K.

References (12)

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M. Rosen (unpublished)
C. S. Barrett, J. Chem. Phys. 25, 1123 (1956)
L. D. Landau and E. M. Lifshitz, Statistical Physics (Pergamon Press, Inc., London, 1958), Chap. 14, p. 430
L. D. Landau and J. M. Khalatnikov, Dokl. Akad. Nauk S.S.S.R. 96, 469 (1954)
M. Rosen, Phys. Rev. 165, 357 (1968)

[c1] D. B. McWhan, P. C. Souers, and G. Jura, Phys. Rev. 143, 385 (1966)

[c2] F. H. Spedding and A. H. Daane, The Rare Earths (John Wiley & Sons, Inc., New York, 1961)

[c3] R. M. Bozorth and J. H. Van Vleck, Phys. Rev. 118, 1493 (1960)

[c4] N. G. Nerenson, C. E. Olsen, and G. P. Arnold, Phys. Rev. 137, A176 (1964)

[c5] O. V. Lounasmaa, Phys. Rev. 143, 399 (1966)

[c6] M. A. Curry, S. Legvold, and F. H. Spedding, Phys. Rev. 117, 953 (1960)

[c7] C. Henry la Blanchetais and F. Trombé, Compt. Rend. 243, 707 (1956)

[c8] M. Rosen (unpublished)

[c9] C. S. Barrett, J. Chem. Phys. 25, 1123 (1956)

[c10] L. D. Landau and E. M. Lifshitz, Statistical Physics (Pergamon Press, Inc., London, 1958), Chap. 14, p. 430

[c11] L. D. Landau and J. M. Khalatnikov, Dokl. Akad. Nauk S.S.S.R. 96, 469 (1954)

[c12] M. Rosen, Phys. Rev. 165, 357 (1968)

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Elastic Moduli and Ultrasonic Attenuation of Polycrystalline Europium from 4.2 to 300°K

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