| Dielectric and Electrical Properties of Ce,Mn:SBN |
| Bong-Hoon Kang, Young-Sop Paek, Bum-Ku Rhee1, Ki-Soo Lim2, Gi-Tae Joo |
Electro-optic Ceramics Lab., KIST
1Department of Physics, Sogang University
2Department of Physics, Chungbuk National University |
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| ABSTRACT |
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Temperature and frequency dependence of dielectric and electrical properties was investigated in cerium and manganese doped Sr$_$0.6/Ba$_$0.4/Nb$_2$O$_$6/(60SBN) ceramic system. Structural deformation of 60SBN by dopants did not appeared. 1350$^{circ}C$-10 h sintered specimen had higher densification than 1250$^{circ}C$-10 h sintered one, to which dielectric properties are related. That the feature of dielectric maxima peaks was typical Diffusive Phase Transition (DPT), it was explained by "random-field Ising model". Even though 60SBN has large dielectric loss at high frequency above 100 ㎑, it is desirable for optical applications because of low dielectric loss at low frequency. From Arrhenius plot of temperature, the activation energy was calculated to 0.45-0.49 eV. |
| Key words:
Ce,Mn:SBN, Relaxor ferroelectrics, Diffusive phase transition, Random field Ising model, Arrhenius plot |
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