Giant dielectric and ferromagnetic response in Ba 0.4 Sr 0.6 Ti 1− y  Co  y  O 3  ceramics | Zendy

Zhang Jingji | Zendy; Liu Jintao | Zendy; Huang Xia | Zendy; Lin Xuecheng | Zendy; Wang Jiangying | Zendy

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Giant dielectric and ferromagnetic response in Ba 0.4 Sr 0.6 Ti 1− y Co y O 3 ceramics

Author(s) -

Zhang Jingji,

Liu Jintao,

Huang Xia,

Lin Xuecheng,

Wang Jiangying

Publication year - 2012

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.201228218

Subject(s) - dielectric , materials science , arrhenius equation , ferromagnetism , ceramic , condensed matter physics , relaxation (psychology) , ferroelectricity , analytical chemistry (journal) , dielectric loss , nuclear magnetic resonance , mineralogy , activation energy , chemistry , composite material , physics , psychology , social psychology , optoelectronics , chromatography

Ba 0.4 Sr 0.6 Ti 1− y Co y O 3 ceramics show a diphase of Ba 1− x Sr x TiO 3 and 6H‐hexagonal BaTi 1− y Co y O 3 . As y increases, Ba 0.4 Sr 0.6 Ti 1− y Co y O 3 ceramics experience a transformation from ferroelectric to relaxor‐like behavior. For the samples with y ≥ 0.10, the dielectric constant exhibits relaxor‐like behavior with the frequency‐dependent temperature of the dielectric peak T m following an Arrhenius law, accompanying a giant dielectric response. The dielectric relaxation with an extremely high dielectric peak is attributed to charge ordering and defects. The samples with low Co levels ( y ≤ 0.05) exhibit dielectric nonlinear behavior, whereas those with high Co levels ( y ≥ 0.10) have ferromagnetic properties.

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