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ЖУРНАЛЫ // Физика твердого тела // Архив

Физика твердого тела, 2016, том 58, выпуск 12, страницы 2423–2426 (Mi ftt9753)

Эта публикация цитируется в 1 статье

Оптические свойства

Soft mode mechanism of the transition into the low-temperature ferroelastic phase in K$_{3}$Na(CrO$_{4})_{2}$ crystals

Yu. È. Kitaeva, A. S. Krylovb, T. I. Maksimovaa

a Ioffe Institute, St. Petersburg
b L. V. Kirensky Institute of Physics, Siberian Branch of the Russian Academy of Sciences, Krasnoyarsk

Аннотация: The sequence of phase transitions $P\bar3m1\to C2/m\to C2/c$ in K$_{3}$Na(CrO$_{4})_{2}$ crystals and existence of the intermediate phase have been studied both experimentally by the Raman scattering method and theoretically by programs and retrieval tools of the Bilbao Crystallographic Server. A zone-edge soft mode responsible for a transition from the intermediate $C2/m$ to a low-symmetry $C2/c$ phase at $T$ = 210 K has been discovered experimentally for the first time. The symmetry of the soft mode has been established theoretically to be $A_{2}^{+}$. The temperature interval of the intermediate monoclinic phase has been determined to be 239–210 K.

Поступила в редакцию: 18.05.2016

Язык публикации: английский


 Англоязычная версия: Physics of the Solid State, 2016, 58:12, 2511–2515

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