| Autor: |
T. Leisegang, I. Shakhverdova, S. Gemming, D. C. Meyer |
| Zdroj: |
Crystal Research & Technology; Jan2010, Vol. 45 Issue 1, p13-17, 5p |
| Abstrakt: |
In situapplication of an electric field to a SrTiO3single crystal plate during nanoindentation led to a reversible change of the mechanical properties at room temperature. When a field of 8 kVcm was applied, Meyer hardness and Youngs modulus decreased by 0.6 GPa and 11 GPa, respectively. An explanation for this behaviour is given by the diffusion of oxygen vacancies resulting in a distortion of the perovskitetype of structure in the nearsurface layer tested by nanoindentation. Simulations using density functional theory support the dependence of elasticity on the presence of vacancies. Thus, we can show the remarkable influence of electric fields on oxide materials which should be considered and used in designing future applications. © 2010 WILEYVCH Verlag GmbH & Co. KGaA, Weinheim [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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