| Original Articles |
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Surface Effects on Dielectric Susceptibility of a Semi-infinite
Ferroelectric
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| QU Baodong;WANG Chunlei;ZHONG Weilie;WANG Zhonglie |
| Department of physics, Shandong University, Jinan 250100 |
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| Cite this article: |
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QU Baodong, WANG Chunlei, ZHONG Weilie et al 1993 Chin. Phys. Lett. 10 558-561 |
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Abstract The profile of susceptibility near the surface of a semi-infinite ferroelectric is calculated from Landau free energy. In surface ferroelectric phase, the susceptibility is reduced at surface for |δ| <<β and much enhanced for |δ| ~β Where δ and β are the extrapolation length and the coherent length respectively. In ferroelectric phase, the surface susceptibility is generally reduced for δ<0. But the curve is not monotonic, there is a minimum in the surface layer. For δ >0, the surface susceptibility is reduced for |δ| <<β and enhanced for δ~β. The curve has a maximum in the surface layer.
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| Keywords:
77.80.-e
65.40.-f
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Published: 01 September 1993
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