Phase coexistence in ferroelectric solid solutions: Formation of monoclinic phase with enhanced piezoelectricity | Zendy

Xiaoyan Lu | Zendy; Hangbo Zhang | Zendy; Limei Zheng | Zendy; Wenwu Cao | Zendy

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Phase coexistence in ferroelectric solid solutions: Formation of monoclinic phase with enhanced piezoelectricity

Author(s) -

Xiaoyan Lu,

Hangbo Zhang,

Limei Zheng,

Wenwu Cao

Publication year - 2016

Publication title -

aip advances

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.421

H-Index - 58

ISSN - 2158-3226

DOI - 10.1063/1.4966142

Subject(s) - monoclinic crystal system , ferroelectricity , piezoelectricity , materials science , tetragonal crystal system , phase (matter) , phase transition , condensed matter physics , stress (linguistics) , crystallography , chemical physics , crystal structure , chemistry , composite material , physics , dielectric , optoelectronics , linguistics , philosophy , organic chemistry

Phase morphology and corresponding piezoelectricity in ferroelectric solid solutions were studied by using a phenomenological theory with the consideration of phase coexistence. Results have shown that phases with similar energy potentials can coexist, thus induce interfacial stresses which lead to the formation of adaptive monoclinic phases. A new tetragonal-like monoclinic to rhombohedral-like monoclinic phase transition was predicted in a shear stress state. Enhanced piezoelectricity can be achieved by manipulating the stress state close to a critical stress field. Phase coexistence is universal in ferroelectric solid solutions and may provide a way to optimize ultra-fine structures and proper stress states to achieve ultrahigh piezoelectricity

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