| Autor: |
Guo, Zhi, Tai, Renzhong, Xu, Hongjie, Gao, Chen, Pan, Guoqiang, Luo, Haosu, Namikawa, Kazumichi |
| Předmět: |
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| Zdroj: |
Applied Physics Letters; 8/20/2007, Vol. 91 Issue 8, p081904, 3p, 1 Black and White Photograph, 1 Diagram, 2 Graphs |
| Abstrakt: |
The average, spontaneous (zero field) structure of the polar nanoregions (PNRs) in a single crystal specimen of the relaxor ferroelectric 0.72Pb(Mg1/3Nb2/3)O3–0.28PbTiO3 has been characterized above Tm by partially coherent x-ray diffraction. At these temperatures, the PNRs are randomly distributed within the crystal and exhibit dimensions of 17 and 10 nm along the [001] and [100] directions, respectively. Based on the results of a previous study [Z. Guo et al., J. Appl. Phys. 101, 053505 (2007)], the long dimension of the PNR is observed to reorient preferentially along the four degenerate diagonal axes [1±1±1], which is believed to contribute to the high electromechanical response in these relaxor materials. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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