Abstract
Pb(Mg1/3Nb2/3)O3–Pb(Fe1/2Nb1/2)O3–PbTiO3 (PMN–PFN–PT) single crystal was grown successfully from high temperature solution by slow cooling method. Structure, frequency dependent dielectric properties and domain configuration of [001]-oriented single crystal have been investigated. X-ray diffraction analysis showed that the as-grown single crystal had a pure perovskite structure with tetragonal symmetry at room temperature. The temperature dependent dielectric permittivity showed only one dielectric anomaly, indicating the ferroelectric–paraelectric phase transition. According to the modified Curie–Weiss relationship, as-grown PMN–PFN–PT single crystal was in an intermediate state between normal and relaxor ferroelectrics. Dielectric permittivity and loss of [001]-oriented PMN–PFN–PT single crystal at room temperature decreased sharply with increasing frequency, which were different from those of PMN–PT65/35 single crystal. Domain configuration of [001]-oriented PMN–PFN–PT single crystal was observed for the first time by using a polarized light microscopy (PLM). The extinction of 90° domains at P/A:0° revealed a tetragonal structure. Domains along (001) face exhibited a straight stripe-like morphology with domain size on the scale of 10μm in average, combining with some much smaller domains about 3–5μm in width at the intersection of domain blocks which helps to minimize its total energy.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.