Ultrasonic attenuation in Lanthanum Monochalcogenides

被引：26

作者：

Yadav, RR ^{[1
]}

Singh, D ^{[1
]}

机构：

[1] Univ Allahabad, Dept Phys, Allahabad 211002, Uttar Pradesh, India

来源：

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN | 2001年 / 70卷 / 06期

关键词：

Lanthanum Monochalcogenides; ultrasonic absorption; elastic constant; crystallographic direction; non-linearity parameters; thermal conductivity;

D O I：

10.1143/JPSJ.70.1825

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Ultrasonic attenuation due to phonon-phonon interaction and thermoelastic relaxation are studied in Lanthanum Monochalcogenides in (110) direction at different higher temperatures. For evaluation of ultrasonic absorption coefficients the second and third order elastic constants (SOEC) and (TOEC) are also calculated. Shear wave attenuation shows maximum along (110) propagation direction with polarized along (110) and the attenuation increases at higher temperatures. Thermo-elastic loss is very small compared to phonon-viscosity loss. Behavior of temperature dependence of the absorption is the same as in case of pure metals and dielectric crystals.

引用

页码：1825 / 1832

页数：8

共 25 条

[1]

Akhieser A, 1939, J PHYS-USSR, V1, P277

[2]

ALERS GA, 1958, J PHYS CHEM SOLIDS, V9, P21

[3]

ALSTAD IK, 1961, PHYS REV, V121, P1637

[4]

BATEMAN TB, 1964, J ACOUST SOC AM, V36, P645

[5]

Born M., 1932, Z PHYS, V1, P75

[6] THERMODYNAMIC DEFINITION OF HIGHER ORDER ELASTIC COEFFICIENTS [J].

BRUGGER, K .

PHYSICAL REVIEW, 1964, 133 (6A) :1611-+

[7] PRESSURE-INDUCED ELECTRONIC COLLAPSE AND STRUCTURAL CHANGES IN RARE-EARTH MONOCHALCOGENIDES [J].

CHATTERJEE, A ;

SINGH, AK .

PHYSICAL REVIEW B-SOLID STATE, 1972, 6 (06) :2285-+

[8] Ultrasonic study of hydrogen motion in a Ti-Zr-Ni icosahedral quasicrystal and a 1/1 bcc crystal approximant [J].

Foster, K ;

Leisure, RG ;

Shaklee, JB ;

Kim, JY ;

Kelton, KF .

PHYSICAL REVIEW B, 2000, 61 (01) :241-245

[9] THIRD-ORDER ELASTIC CONSTANTS OF ALKALI HALIDE CRYSTALS [J].

GHATE, PB .

PHYSICAL REVIEW, 1965, 139 (5A) :1666-&

[10]

HIKI Y, 1981, ANNU REV MATER SCI, P11

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