Correlations of dielectric properties with electronic structure and phonon vibration of low loss tunable Ba{sub 0.4}Sr{sub 0.6}Ti{sub 1-y}Mn{sub y}O{sub 3} ceramics

Journal Article · Mon Aug 01 00:00:00 EDT 2011 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3622337· OSTI ID:22036678

Jingji, Zhang ^[1]; Jiwei, Zhai ^[1]; Yewen, Zhang ^[1]

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1. Shanghai Key Laboratory of Special Artificial Microstructure Materials and Technology, 1239 Siping Road, Shanghai 200092 (China)

Correlations of dielectric properties with electronic structure and phonon vibration of Ba{sub 0.4}Sr{sub 0.6}Ti{sub 1-y} Mn{sub y}O{sub 3} (y = 0.00-0.20) ceramics were studied by using spectroscopic techniques. High level of Mn substitution prevented the reduction of Ti{sup 4+} and enhanced the charge ordering of Ti{sup 3+}/Ti{sup 4+}, leading to materials with high Q values. An increase in the concentration of Mn resulted in hardening of the softest mode, which led to a reduction in relative permittivity, dielectric loss, and tunability with increasing y. Raman spectra revealed that higher vibration frequency of Ti-O bonds was related to lower relative permittivity, and narrower width of Mn-O stretching corresponded to a higher Q x f.

• OSTI ID: 22036678
• Journal Information: Journal of Applied Physics, Vol. 110, Issue 3; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
36 MATERIALS SCIENCE
BARIUM COMPOUNDS
CERAMICS
CHEMICAL BONDS
CORRELATIONS
DIELECTRIC MATERIALS
ELECTRONIC STRUCTURE
HARDENING
MANGANATES
MANGANESE
PERMITTIVITY
PHONONS
RAMAN SPECTRA
RELAXATION LOSSES
STRONTIUM COMPOUNDS
TITANIUM COMPOUNDS
TITANIUM IONS
X-RAY PHOTOELECTRON SPECTROSCOPY