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Morphotropic Domain Structure and Phase Components in High-TC Ferroelectric Single Crystals of a Ternary Perovskite Solid Solution

Abstract

Ferroelectric and piezoelectric materials with a high Curie-temperature (TC) have attracted increasing interest due to the need in applications under extreme conditions. In this work, novel high- TC ferroelectric single crystals of (0.95-x)BiScO3-0.05Pb(Cd1/3Nb2/3)O3-xPbTiO3 (BS-PCN-xPT) ternary solid solution with different compositions have been successfully grown. With increasing PT concentration, a composition-induced structural crossover from a rhombohedral phase, through morphotropic phase boundary (MPB), to a tetragonal phase, is observed. A monoclinic phase is found at the MPB. The temperature dependences of the dielectric permittivity reveal a high Curie-temperatures of 363 oC ~ 452 oC (at 1 MHz). The macroscopic and mesoscopic ferroelastic/ferroelectric domain structures systemically characterized by polarized light microscopy (PLM) and piezoresponse force microscopy (PFM) reveal the existence of monoclinic domains in the crystals with the MPB composition. The presence of high TC signifies that the BS-PCN-xPT single crystals are promising candidates for applications such as electromechanical transducers that can be operated in a wide temperature range.

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Publication details

The article was received on 12 Mar 2018, accepted on 27 Jul 2018 and first published on 02 Aug 2018


Article type: Paper
DOI: 10.1039/C8TC01198B
Citation: J. Mater. Chem. C, 2018, Accepted Manuscript
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    Morphotropic Domain Structure and Phase Components in High-TC Ferroelectric Single Crystals of a Ternary Perovskite Solid Solution

    Z. Luo, N. Zhang, Z. Liu, J. Zhuang, J. Zhao, Z.-G Ye and W. Ren, J. Mater. Chem. C, 2018, Accepted Manuscript , DOI: 10.1039/C8TC01198B

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