Combined experimental and theoretical study of the low temperature dielectric and magnetic properties of trivalent Eu ion doped SrTiO{sub 3} ceramics

Journal Article · Thu Mar 15 04:00:00 EDT 2012 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.3699044· OSTI ID:22036830

Jiangzhou, Yu; Liang, Fang; Tianyi, Cai; Sheng, Ju; Wen, Dong; Fengang, Zheng; Mingrong, Shen ^[1]

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1. Jiangsu Key Laboratory of Thin Films and Department of Physics, Soochow University, Suzhou, 215006 (China)

Single-phase Sr{sub 1-3x/2}Eu{sub x}TiO{sub 3} (SETO{sub x}) (x = 0-0.075) ceramics were prepared to study the effects of Eu substitution on their crystal structure, low temperature dielectric, and magnetic behaviors. Rietveld refinement of X-ray diffraction data yields direct evidence that the Eu ion substitutes Sr site at the perovskite. The measured dielectric properties can be well explained by the mean-field model. It has been found that the anomaly dielectric enhancement behavior exists in the SETO{sub x=0.005} sample, while more stable quantum paraelectric states are obtained in other doped samples. On the other hand, all the Eu doped samples exhibit doping concentration dependence of paramagnetism. Developing the linear response model, we conclude that a molecular field is acting on Eu ions possibly via the spin polarized Eu-O-Ti hybridization.

• OSTI ID: 22036830
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 6 Vol. 111; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CERAMICS
CONCENTRATION RATIO
CRYSTAL STRUCTURE
DIELECTRIC MATERIALS
DOPED MATERIALS
EUROPIUM COMPOUNDS
EUROPIUM IONS
MAGNETIC PROPERTIES
MAGNETIZATION
MEAN-FIELD THEORY
PARAMAGNETISM
PERMITTIVITY
SPIN ORIENTATION
STRONTIUM TITANATES
X-RAY DIFFRACTION