Elastic inhomogeneity and acoustic phonons in Pd-, Pt-, and Zr-based metallic glasses

被引：13

作者：

Ichitsubo, T. ^{[1
]}

Itaka, W. ^{[1
]}

Matsubara, E. ^{[1
]}

Kato, H. ^{[2
]}

Biwa, S. ^{[3
]}

Hosokawa, S. ^{[4
]}

Matsuda, K. ^{[5
]}

Saida, J. ^{[6
]}

Haruyama, O. ^{[7
]}

Yokoyama, Y. ^{[2
]}

Uchiyama, H. ^{[8
]}

Baron, A. Q. R. ^{[8
,9
]}

机构：

[1] Kyoto Univ, Dept Mat Sci & Engn, Kyoto 6068501, Japan

[2] Tohoku Univ, Inst Mat Res, Sendai, Miyagi 9808577, Japan

[3] Kyoto Univ, Dept Micro Engn, Kyoto 6068501, Japan

[4] Hiroshima Inst Technol, Ctr Mat Res Using Generat Synchrotron Radiat Faci, Hiroshima 7315193, Japan

[5] Kyoto Univ, Grad Sch Sci, Dept Phys, Kyoto 6068502, Japan

[6] Tohoku Univ, Interdisciplinary Res Ctr, Sendai, Miyagi 9808578, Japan

[7] Tokyo Univ Sci, Fac Sci & Technol, Dept Phys, Noda, Chiba 2788510, Japan

[8] SPring 8 JASRI, Sayo, Hyogo 6795198, Japan

[9] SPring 8 RIKEN, Sayo, Hyogo 6795148, Japan

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 17期

基金：

日本学术振兴会;

关键词：

X-RAY-SCATTERING; MULTIPLE-SCATTERING; UNIDIRECTIONAL COMPOSITES; TRANSITION TEMPERATURE; DYNAMICS; EXCITATION; LIQUIDS; WAVES;

D O I：

10.1103/PhysRevB.81.172201

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We have investigated acoustic-phonon behavior of Pd-, Pt-, and Zr-based metallic glasses with the combination of inelastic x-ray scattering and ultrasonic (US) measurements. In the dispersion of the longitudinal acoustic modes at small wave number Q, the phase velocity of phonon tends to exceed the US velocity with a wavelength of macroscopic scale for Pd-and Pt-based glasses, whereas the former goes close to the latter for Zr-based glasses. Furthermore, in all the cases, the mean free path L of phonon apparently increases steeply at a certain Q value. These phenomena on the acoustic phonon behavior can be qualitatively explained by the elastic-wave-scattering theory with a simple two-phase model.

引用

页数：4

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