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篇目详细内容 |
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【篇名】 |
Gradient-stress on polarization in Ba1?xSrxTiO3 films |
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【刊名】 |
Frontiers of Physics in China |
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【刊名缩写】 |
Front. Phys. China |
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【ISSN】 |
1673-3487 |
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【EISSN】 |
1673-3606 |
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【DOI】 |
10.1007/s11467-007-0042-3 |
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【出版社】 |
Higher Education Press and Springer-Verlag |
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【出版年】 |
2007 |
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【卷期】 |
2
卷3期 |
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【页码】 |
318-321
页,共
4
页 |
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【作者】 |
LI Li-ben;
YOU Jing-han;
CHEN Qing-dong;
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【关键词】 |
ferroelectricity; thin film; stress; phase transition |
【摘要】 |
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A group of position-thickness-dependent stresses are used to modified Landau-Devonshire theory to investigate the second-order phase transition in Ba1?xSrxTiO3 films. The result shows that the short-range interaction between the unit cells of the film and the substrate induces the phase transition dispersion and the rise of the transition temperature in the films. The dependence of the effective dielectric constant on the temperature and the average spontaneous polarization on the film thickness are computed, which qualitatively agree with the experiments. |
