| Autor: |
Kojima, Seiji, Helal, Md. Al, Aftabuzzaman, Md. |
| Předmět: |
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| Zdroj: |
Ferroelectrics; 2017, Vol. 519 Issue 1, p109-114, 6p |
| Abstrakt: |
Brillouin scattering was measured on a ferroelectric 0.44Pb(Mg1/3Nb2/3)O3-0.56PbTiO3(PMN-56PT) single crystal with weak quenched random fields in the polarized (VV) and depolarized (VH) scattering geometries over a wide temperature range. The VH- and VV- central peaks (CPs) related to the transverse and longitudinal polarization fluctuations of polar nanoregions (PNRs) were successfully observed in a paraelectric cubic phase. The inverse relaxation time (1/τCP) determined by the VH-CP indicates the stretched slowing down above the Curie temperature (∼ 533 K). The temperature dependence of the average size of dynamic PNRs was estimated. [ABSTRACT FROM PUBLISHER] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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