Single crystal growth and physical properties of RbTiOPO4 doped with niobiumстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Single crystals of solid state solutions Rb1-xTi1-xNbxOPO4 (RTP:Nb) are grown and their dielectric, conductive and non-linear optical properties are studied. The maximum content of niobium in these crystals is found to be near x = 0.1. The presence of niobium leads to more slow growth of {1 0 0} faces so the crystals take the plate-like form. Ferroelectric phase transitions become more diffuse and their temperature decreases. The characteristic feature of dielectric properties of the RTP: Nb crystals is the appearance of a broad relaxation maximum of epsilon(33) in the temperature region of 100-600 degrees C which is connected with the formation of vacancies in the rubidium positions. The intensity of the second harmonic generation under laser illumination decreases with the niobium content. (C) 2004 Elsevier B.V. All rights reserved.