| Autor: |
Sepliarsky, M., Phillpot, S. R., Stachiotti, M. G., Migoni, R. L. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 3/1/2002, Vol. 91 Issue 5, p3165, 7p, 8 Graphs |
| Abstrakt: |
The phase transitions and dynamical behavior of superlattices consisting of equal-thickness layers of a perovskite ferroelectric (KNbO[sub 3]) and a perovskite paraelectric (KTaO[sub 3]) are explored using molecular-dynamics simulation. We find that the response in the plane and in the modulation direction are essentially decoupled. The Curie temperature for the transition from a polarized to unpolarized state in the modulation direction decreases approximately linearly with modulation length, λ, for λ>12; for smaller modulation lengths, it is essentially constant. The Curie temperature in the plane appears to be only weakly modulation-length dependent. We relate our results to experimental findings on the same system. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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