| Autor: |
Serrao, Claudy Rayan, Krupanidhi, S. B., Bhattacharjee, Joydeep, Waghmare, Umesh V., Kundu, Asish K., Rao, C. N. R. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 10/1/2006, Vol. 100 Issue 7, p076104, 3p, 2 Graphs |
| Abstrakt: |
InMnO3 which has a hexagonal structure similar to that of YMnO3 is found to show a canted antiferromagnetic behavior below 50 K (TN) and a ferroelectric (FE) transition at 500 K accompanied by hystersis. We have determined the structure, polarization, and energetics of the FE and paraelectric (PE) phases of InMnO3 using first-principles density functional theory calculations based on pseudopotentials and a plane-wave basis, and find the polarization of the PE phase to be a half-integer quantum. The difference in polarization of the FE and PE phases calculated along a simple path is different from the absolute value of polarization of the FE phase. A weak piezoelectric response is exhibited by InMnO3 to uniaxial strain. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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