Mean-square displacements of metal and boron atoms in crystal lattices of rare-earth hexaborides

被引:6
|
作者
Novikov, VV [1 ]
机构
[1] Bryansk State Pedag Inst, Bryansk 241036, Russia
关键词
D O I
10.1134/1.1602894
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The intensities of the I-410 and I-411 reflections of nine rare-earth hexaborides MB6 (M=La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy) are experimentally studied in the temperature range 4.2-300 K. The mean-square displacements of metal and boron atoms are calculated from the temperature dependences of the intensities I-410(T) and I-411(T). The characteristic temperatures of the metal (theta(M)) and boron (theta(B)) sublattices of rare-earth hexaborides are determined in the Debye approximation. It is found that the characteristic temperatures decrease with an increase in the atomic number of the metal. (C) 2003 MAIK "Nauka/Interperiodica".
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页码:1543 / 1548
页数:6
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