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Growth and properties of ferroelectric potassium ferrocyanide trihydrate single crystals
Author(s) -
Kanagadurai R.,
Sankar R.,
Sivanesan G.,
Srinivasan S.,
Jayavel R.
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510683
Subject(s) - ferroelectricity , potassium ferrocyanide , fourier transform infrared spectroscopy , analytical chemistry (journal) , single crystal , chemistry , nucleation , crystal (programming language) , raman spectroscopy , potassium , crystallography , materials science , inorganic chemistry , chemical engineering , optics , chromatography , organic chemistry , dielectric , programming language , physics , optoelectronics , computer science , engineering
Single crystals of potassium ferrocyanide trihydrate, K 4 [Fe(CN) 6 ·3H 2 O (KFCT), a ferroelectric material with Curie temperature 251K were grown in silica gel at room temperature for the first time by the solubility reduction method. Resorcinol and ethyl alcohol were used for the purpose of gel setting and supernatant liquid respectively. Optical and mechanical properties were studied for the grown crystal. The structure of the grown crystal was confirmed by X‐ray diffraction analysis. Fourier Transform Infrared (FTIR) and FT Raman spectral analysis of the crystalline samples reveal that the crystalline sample consist consists of all functional groups. Thermal analysis of the crystalline sample was performed by TGA and DTA methods. The Vicker's micro hardness value was measured for KFCT crystals. The square etch pits with a hopper‐like structure is an indicative of 2D nucleation mechanism. (© 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)