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Ferroelectricity in a New Luminescent Organic-Inorganic Hybrid: [CH 3 (C 6 H 5 ) 3 P] 2 MnBr 4

2015; Taylor & Francis; Volume: 481; Issue: 1 Linguagem: Inglês

10.1080/00150193.2015.1049483

1563-5112

Ahmad K. Tammam, Thanaa Sh. El-Dean, M.F. Mostafa,

X-ray Diffraction in Crystallography

The material was synthesized, investigated by DSC, X-ray powder diffraction and impedance measurement. Ferroelectric activity was found below 310 K. The material crystallizes in a monoclinic system, space group P21 at T= 298 K, a =9.623 Å, b =12.565 Å, c =16.45 Å and β = 105.6°. Spontaneous polarization was estimated by Sawyer-Tower Bridge and measured by pyrocharge shows ferroelectricity. Permittivity shows a sharp frequency dependent peak with Curie temperature at 310 K.