Debye-Waller factors and Debye temperatures of alkali halide mixed crystals

被引：13

作者：

Krishna, PG ^{[1
]}

Subhadra, KG ^{[1
]}

Swamy, TK ^{[1
]}

Sirdeshmukh, DB ^{[1
]}

机构：

[1] Kakatiya Univ, Dept Phys, Warangal 506009, Andhra Pradesh, India

来源：

PRAMANA-JOURNAL OF PHYSICS | 1999年 / 52卷 / 05期

关键词：

alkali halides; mixed crystals; Debye-Waller factors; Debye temperature;

D O I：

10.1007/BF02830096

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Debye-Waller factors of KxRb(1-x)I and NaClxBr(1-x) mixed crystals have been determined from X-ray diffraction intensities. The mean Debye-Waller factor is found to vary nonlinearly with the composition with positive deviations from linearity. The Debye temperatures (calculated from the Debye-Waller factors) are found to vary slightly non-linearly with composition with negative deviations from linearity. The Debye temperatures of seven alkali halide mixed crystal systems are critically compared with values predicted from six laws for composition variation. Using the estimated standard deviation as the criterion for the goodness of the fit, it is shown that the inverse cube (Kopp-Neumann) law provides the best description for the composition dependence of Debye temperatures of mixed crystals.

引用

页码：503 / 509

页数：7

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