FERROROTATIVE TRANSITION IN ANTIFLUORITE CRYSTAL K2OSCL6

被引：35

作者：

ARMSTRONG, RL ^{[1
]}

MINTZ, D ^{[1
]}

POWELL, BM ^{[1
]}

BUYERS, WJL ^{[1
]}

机构：

[1] ATOM ENERGY CANADA LTD,CHALK RIVER NUCL LABS,CHALK RIVER K0J 1J0,ONTARIO,CANADA

来源：

PHYSICAL REVIEW B | 1978年 / 17卷 / 03期

关键词：

D O I：

10.1103/PhysRevB.17.1260

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structural phase transition in potassium hexachloro-osmate (K2OsCl6) has been investigated at the NRU reactor, Chalk River, by elastic neutron-scattering methods. The observed change in the crystal structure in passing through Tc indicates that the OsCl6 octahedra undergo a collective ferrorotation. The data are consistent with both a displacive and an order-disorder model. The transition occurs at Tc=44.5±0.4 K and is continuous, with a critical exponent β=0.35±0.06 characteristic of three-dimensional phase transitions. © 1978 The American Physical Society.

引用

页码：1260 / 1265

页数：6

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