Low-temperature acoustic properties of single-crystal hafnium

被引：1

作者：

Azhazha, V. M. ^{[1
]}

Azhazha, R. V. ^{[1
]}

Bulatov, A. S. ^{[1
]}

V'yugov, P. N. ^{[1
]}

Dolzhenko, V. F. ^{[1
]}

Korniets, A. V. ^{[1
]}

机构：

[1] Natl Sci Ctr, Kharkov Phys & Technol Inst, UA-61108 Kharkov, Ukraine

来源：

INORGANIC MATERIALS | 2008年 / 44卷 / 05期

关键词：

Elastic Constant; Hafnium; Lithium Niobate; Phonon Spectrum; Adiabatic Compressibility;

D O I：

10.1134/S0020168508050099

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Five independent adiabatic elastic tensor components c(ij) of single-crystal Hf (0.3% Zr) have been precisely measured in the range 78-300 (c(11) and c(33)) or 78-160 K (c(12), c(13), and c(44)) at 50 MHz using an ultrasonic pulse technique. The corresponding linear absorption coefficients alpha(ij) (T) have been measured in the same temperature ranges. The c(ij) data have been used to determine adiabatic compressibilities beta(parallel to) and beta(perpendicular to), and Young's moduli E-parallel to and E-perpendicular to along and across the c axis, respectively. Near 140 K, we have revealed an anomaly in c(33)(T) due to changes in the phonon spectrum of single-crystal alpha-Hf. The observed anomalies in temperature-dependent alpha(11) and alpha(33) are tentatively attributed to grown-in dislocations.

引用

页码：481 / 484

页数：4