Unusually soft ferroelectricity in (Ba 1− x  Sr  x  )TiO 3  ceramics | Zendy

Wang Le | Zendy; Wang Xiaoli | Zendy; Shi Jing | Zendy; Sun Ruiting | Zendy; Li Bo | Zendy

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Unusually soft ferroelectricity in (Ba 1− x Sr x )TiO 3 ceramics

Author(s) -

Wang Le,

Wang Xiaoli,

Shi Jing,

Sun Ruiting,

Li Bo

Publication year - 2011

Publication title -

physica status solidi (a)

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.532

H-Index - 104

eISSN - 1862-6319

pISSN - 1862-6300

DOI - 10.1002/pssa.201127086

Subject(s) - ferroelectricity , materials science , dielectric , octahedron , ceramic , polarization (electrochemistry) , ferroelectric ceramics , phase transition , permittivity , condensed matter physics , atmospheric temperature range , mineralogy , analytical chemistry (journal) , crystallography , crystal structure , optoelectronics , chemistry , physics , composite material , thermodynamics , chromatography

Temperature evolution of polarization versus electric field of (Ba 0.4 Sr 0.6 )TiO 3 and (Ba 0.9 Sr 0.1 )TiO 3 ceramics was investigated. Polarization characteristics of (Ba 0.9 Sr 0.1 )TiO 3 belong to ferroelectrics with diffuse phase transition (DPT), while the ones of (Ba 0.4 Sr 0.6 )TiO 3 are rather different. (Ba 0.4 Sr 0.6 )TiO 3 ceramics display very soft ferroelectricity and extremely high dielectric tunability. The long‐range ferroelectric ordering in (Ba 0.4 Sr 0.6 )TiO 3 ceramics disappears completely below temperature T m of maximum dielectric permittivity ε m , which is different from normal DPT ferroelectrics. The special ferroelectric behavior is hypothesized to be attributed to random arrangements of the distorted TiO 6 octahedra.

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