Structural phase transition in two-dimensional tetramer-cuprate Na₅RbCu₄(AsO₄)₄Cl₂

Structural phase transition in two-dimensional tetramer-cuprate Na₅RbCu₄(AsO₄)₄Cl₂

Gnezdilov, V. ; Bedarev, V. ; Pashkevich, Yu. ; Lemmens, P. ; Zvyagin, S. ; Gnatchenko, S. ; Pashchenko, M. ; Mo, X. ; Queen, W. ; Hwu, S.J.

Тема: Низкотемпеpатуpный магнетизм

Інший ID: PACS: 64.60.–i, 63.20.–e, 78.20.Fm, 78.30.–j

URI: http://dspace.nbuv.gov.ua/handle/123456789/120923

Посилання: Structural phase transition in two-dimensional tetramer-cuprate Na₅RbCu₄(AsO₄)₄Cl₂ / V. Gnezdilov, V. Bedarev, Yu. Pashkevich, P. Lemmens, S. Zvyagin, S. Gnatchenko, M. Pashchenko, X. Mo, W. Queen, S.J. Hwu // Физика низких температур. — 2007. — Т. 33, № 08. — С. 897–901. — Бібліогр.: 6 назв. — англ.

Підтримка: This work was partially supported by the ESF (ESF-HFM) and the DFG (Priority program «Molecular Magnetism»).

Дата: 2007

Завантажень: 451

Structural phase transition in two-dimensional tetramer-cuprate Na₅RbCu₄(AsO₄)₄Cl₂

Анотація:

Using Raman scattering and optical birefringence we have investigated a low-temperature phase transition in single crystal of the two-dimensional Na₅RbCu₄(AsO₄)₄Cl₂. Phonon anomalies point to a first order nature of the transition. The observed transition is most probably related to a order-disorder transition of the Rb ion positions along the z axis within the ionic framework of mixed alkali metal chloride lattices.

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