Electric field induced effect on the optical, dielectric and ferroelectric properties of Pb(Fe2/3 W1/3)O3 single crystals
Electric field induced effect on the optical, dielectric and ferroelectric properties of Pb(Fe2/3 W1/3)O3 single crystals
复制标题
电场诱导对Pb(Fe2/3 W1/3)O3单晶光学、介电和铁电性能的影响
DOI：
10.1080/00150199408245097
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发表时间：
1994
期刊：
影响因子：
0.8
通讯作者：
H. Schmid
中科院分区：
文献类型：
--
作者：
Z. Ye;H. Schmid
采用高温溶液生长法合成了复合钙钛矿Pb(Fe2/3 W1/3)O3 [PFW]单晶，并对其在零场和偏压场下的光学和介电特性进行了研究。结果表明，在零电场下，PFW晶体在10k以下仍保持光学各向同性，在178k附近介电常数的弥散最大值是由典型的强频散的介电弛豫引起的。施加电场可以诱导宏观极性相，在低温下去除E后仍保持亚稳态。外加电场的极性反转会导致感应极化pind的反转，从而产生具有铁电特性的介电磁滞回线。因此，PFW中的铁电性实际上是由巨极相的感应引起的。随着温度的降低，产生诱导极化的矫顽力场急剧增大。开关在…
Abstract Single crystals of the complex perovskite Pb(Fe2/3 W1/3)O3 [PFW], synthesized from high temperature solution growth, have been studied by optical and dielectric characterizations at zero field and under an electric bias field. It was found that at zero electric field the PFW crystals remain optically isotropic down to 10 K, and that the diffuse maximum of the permittivity near 178 K results from a typical dielectric relaxation with strong frequency dispersion. Application of an electric field can induce a macroscopically polar phase, which remains metastable when removing E at low temperatures. Reversing the polarity of the applied field leads to a reversal of the induced polarization P ind , giving rise to the dielectric hysteresis loop of ferroelectric character. Thus the ferroelectricity in PFW results in reality from the induction of the macropolar phase. The coercive field for the establishment of the induced polarization increases sharply with decreasing temperature. The switching of the in...