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首页> 外文期刊>Physica status solidi, B. Basic research >Electric field-revealed precursor ferroelectric properties of low lithium ion-doped KTaO3
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Electric field-revealed precursor ferroelectric properties of low lithium ion-doped KTaO3

机译：低锂离子掺杂的KTaO3的电场揭示前驱体铁电性能

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摘要

The results of low-temperature linear chi'(1) as well as nonlinear chi'(2) and chi'(3) electric susceptibility and polarization P measurements of the K1-xLixTaO3, x = 0.01 crystal are presented. A coexistence of two different phases within a temperature range where the glassy state sets in is proposed. In the current work, we have proved the existence of an electric field-revealed precursor ferroelectric phase without low-frequency relaxation. With decreasing temperature, the second-order nonlinear electric susceptibility, chi'(2), which is proportional to the polarization P, increases from zero at about 40Kto chi'(2) = 1.25 x 10(-4) m.V-1 at 4.2 K. This behavior is independent of the frequency of the ac probing electric field, and thus discloses the existence of a newly observed polarization component.
机译：给出了K1-xLixTaO3 x = 0.01晶体的低温线性chi'（1）以及非线性chi'（2）和chi'（3）的电化率和极化P测量结果。提出了在玻璃态进入的温度范围内两种不同相的共存。在当前的工作中，我们已经证明存在没有低频弛豫的电场揭示的前驱铁电相。随着温度降低，与极化P成正比的二阶非线性电化率chi'（2）从约40K的零增加到4.2时的chi'（2）= 1.25 x 10（-4）mV-1 K.这种行为与交流探测电场的频率无关，因此公开了新观察到的极化分量的存在。

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