A NEUTRON BRILLOUIN-SCATTERING STUDY OF MG70ZN30

被引：10

作者：

BENMORE, CJ

OLIVER, BJ

SUCK, JB

ROBINSON, RA

EGELSTAFF, PA

机构：

[1] LOS ALAMOS NATL LAB,LANSCE,LOS ALAMOS,NM 87545

[2] INST MAX VON LAUE PAUL LANGEVIN,F-38042 GRENOBLE 9,FRANCE

来源：

JOURNAL OF PHYSICS-CONDENSED MATTER | 1995年 / 7卷 / 25期

关键词：

D O I：

10.1088/0953-8984/7/25/004

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

Inelastic neutron scattering measurements have been made with momentum transfers within the first pseudo-Brillouin zone of a magnesium/zinc glass at 100 K and 297 K. We describe the application of a new spectrometer (PHAROS) for these studies. Because the longitudinal velocity of sound is about 4300 m s(-1), a high incident neutron energy (0.187 eV) was required. Data have been obtained down to Q similar or equal to 8 nm(-1) and HBAR omega = 25 meV well inside the first pseudo-Brillouin zone of the glass. Evidence for two predominantly longitudinal excitations in the Mg70Zn30 glass is presented. Their positions agree approximately with theoretical predictions.

引用

页码：4775 / 4785

页数：11

共 12 条

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[2] Suck J-B, Rudin H, Guntherodt H-J, Beck H, Short-wavelength transverse collective modes in a metallic glass, Journal of Physics C: Solid State Physics, 13, 36, (1980)
[3] Robinson RA, (1989)
[4] Suck J-B, Egelstaff PA, Robinson RA, Sivia DS, Taylor AD, Brillouin Scattering with Neutrons in an Amorphous Solid, Europhysics Letters (EPL), 19, 3, (1992)
[5] Suck J-B, Egelstaff PA, Robinson RA, Sivia DS, Taylor AD, J. Non-Cryst. Solids, 150, 1-3, (1992)
[6] Hafner J, J. Phys. C: Solid State Phys., 16, 30, (1983)
[7] Robinson RA, Nutter M, Ricketts RL, Larson E, Sandoval JP, Lysaght PS, Olivier BJ, (1993)
[8] Squires GL, (1978)
[9] Windsor CG, (1981)
[10] Soper AK, Egelstaff PA, Nucl. Instrum. Methods, 178, 2-3, (1980)

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