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Dielectric, domain, and optical studies in high-Curie-temperature Pb(In1/2Nb1/2)1-xTixO3 (x=0.40) single crystal

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5 Author(s)
Tu, C.S. ; Graduate Institute of Applied Science and Engineering, Fu Jen University, Taipei 242, Taiwan, Republic of China ; Wang, F.-T. ; Hung, C.-M. ; Chien, R.R.
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Dielectric permittivity, domain structure, and hysteresis loop have been measured as a function of temperature in a (001)-cut Pb(In1/2Nb1/2)0.6Ti0.4O3 (PINT40%) single crystal. A first-order-type tetragonal/monocliniccubic phase transition takes place at TC≅486 K, below which tetragonal and monoclinic domains coexist. Frequency-dependent maxima in dielectric absorption appear in the region of 180–260 K and can be described by the Vogel-Fulcher equation. Optical transmission and refractive indices were obtained as a function of wavelength. The crystal shows a broad transparency (0.4–6.0 μm) and no obvious birefringence, indicating that the crystal structure averaged over the optically anisotropic ferroelectric domains is optically isotropic.

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Journal of Applied Physics  (Volume:100 ,  Issue: 10 )