Surface-layer effect in MnTiO3 ceramics at low temperatures |
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| Authors: | Teng Li Chunchang WangXiaohong Sun Guojing WangChangmei Lei Lina Liu |
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| Institution: | Laboratory of Dielectric Functional Materials, School of Physics and Material Science, Anhui University, Hefei 230039, PR China |
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| Abstract: | MnTiO3 ceramics were prepared via the traditional solid-state reaction route. The low-temperature (100–330 K) dielectric properties of MnTiO3 have been systematically investigated in the frequency range from 100 Hz to 5 MHz. Our results showed that MnTiO3 exhibits intrinsic dilectric response in a wide temperature range up to 200 K. A relaxation appears near room temperature. This relaxation can be enhanced by annealing treatment in oxygen and weakened in nitrogen. Reducing the sample thickness gradually leads to the disappearance of the relaxation. Based on these experimental facts, the relaxation was ascribed to be a Maxwell–Wagner relaxation due to surface-layer effect. |
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| Keywords: | Ceramics Surface-layer effect Maxwell&ndash Wagner relaxation |
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