Tsukada Shinya, Ike Yuji, Kano Jun, Kojima Seiji, Sekiya Tadashi, Shimojo Yoshiro, Wang Ruiping
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Ibaraki 305-8573, Japan.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Dec;54(12):2632-6. doi: 10.1109/TUFFC.2007.590.
Abstract-Structural phase transitions in relaxor ferroelectric materials remain to be one of the most puzzling issues in materials science. In the present work, we have investigated relaxational and vibrational properties of a relaxor ferroelectric 0.71Pb(Ni(1/3)Nb(2/3))O(3)-O.29PbTiO(3) single crystal by means of inelastic light scattering measurements. Analysis based on the spectra has shown anomalous behaviors at Burns' temperature T(d), freezing temperature T(f) , those are related to a development of polar nanoregions (PNRs). The PNR must play a key role in the relaxor nature, and obtained results provide new insights into the relaxational dynamics in the PNRs and into how they develop below T(f).
摘要——弛豫铁电材料中的结构相变仍然是材料科学中最令人困惑的问题之一。在本工作中，我们通过非弹性光散射测量研究了弛豫铁电体0.71Pb(Ni(1/3)Nb(2/3))O(3)-0.29PbTiO(3)单晶的弛豫和振动特性。基于光谱的分析表明，在伯恩温度Td和冻结温度Tf处存在异常行为，这些行为与极性纳米区域（PNR）的发展有关。PNR必定在弛豫特性中起关键作用，所得结果为PNR中的弛豫动力学以及它们在Tf以下如何发展提供了新的见解。
