Temperature dependence of IR absorption spectra of the K3Na(CrO4)2 ferroelastic

被引：2

作者：

Kitaev, Yu. E. ^{[1
]}

Maksimova, T. I. ^{[1
]}

Hermanowicz, K. ^{[2
]}

Maczka, M. ^{[2
]}

Hanuza, J. ^{[2
]}

机构：

[1] Russian Acad Sci, AF Ioffe Phys Tech Inst, St Petersburg 194021, Russia

[2] Polish Acad Sci, Trzebiatowski Inst Low Temp & Struct Res, PL-50422 Wroclaw, Poland

来源：

PHYSICS OF THE SOLID STATE | 2013年 / 55卷 / 01期

关键词：

BILBAO CRYSTALLOGRAPHIC SERVER; MOLECULAR IMPURITY ION; LOCAL TRANSITION; PHASE-TRANSITION; OPTICAL SPECTROSCOPY; K3NA(SEO4)(2); SCATTERING;

D O I：

10.1134/S1063783413010198

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

This paper reports on the first study of IR absorption spectra of K3Na(CrO4)(2) crystals within a broad temperature interval 300-4 K. Significant changes with temperature have been observed in the region of high-frequency internal vibrations nu(3) and nu(1) of the CrO4 group (800-1000 cm(-1)), which consisted in the appearance of new features in the IR spectrum at temperatures below T (c1) a parts per thousand 230 K and T (c2) a parts per thousand 150 K. These changes derive from the presence of several phase transitions, P m1 -> C2/m -> C2/c, occurring in the ferroelastic under study. The results obtained fit to our earlier findings dealing with Raman light scattering in K3Na(CrO4)(2) single crystals.

引用

页码：145 / 149

页数：5

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