Hysteresis in acoustic properties of ferroelectric relaxor Pb[(Zn1/3Nb2/3)0.955Ti0.045]O3 single crystals studied by Brillouin and dielectric spectroscopies
作者： Jae-Hyeon Ko , Do Han Kim , Seiji Kojima , Wenzhi Chen , Zuo-Guang Ye
DOI: 10.1063/1.2338829
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摘要: Acoustic and dielectric properties of Pb[(Zn1∕3Nb2∕3)1−xTix]O3 (PZN‐xPT) single crystals with x=0.045 have been studied by the high-resolution micro-Brillouin scattering spectroscopy in a wide temperature range. The softening Brillouin shift increase relaxation time upon cooling indicated formation polar nanoregions (PNRs) slowing down their dynamics. In contrast to acoustic typical model relaxors such as lead magnesioniobate, change near its minimum became sharper on heating compared cooling, pointing clear existence hysteresis dynamics diffuse phase transition PZN-4.5%PT. Since number PNRs will it may be expected that kinetics would become slower, lower resulting more sluggish, broad feature observed during cooling. This result indica...
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