机械活化超细SrTiO3的弛豫行为

IF 1.3 4区物理与天体物理 Q4 PHYSICS, CONDENSED MATTER

Ferroelectrics Letters Section Pub Date : 2020-01-24 DOI:10.1080/07315171.2020.1799626

L. Korotkov, O. Bulgakov, A. I. Bocharov, F. D. Al Jaafari

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引用次数: 0

摘要

在10-300 K的温度范围内，研究了由合成的SrTiO3研磨得到的纳米颗粒和化学沉积得到的纳米颗粒烧结的纳米结构钛酸锶样品的介电性能。第一个样品显示了弛豫铁电体的特征。在40k附近观察到的介电响应色散具有两个弛豫过程的特征，弛豫时间谱很宽。假定“高温”弛豫过程与弹性域的动力学有关。讨论了弹性变形与极化相互作用的可能机理。

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Relaxor-like behavior of mechanically activated ultrafine SrTiO3

Abstract Dielectric properties of nanostructured strontium titanate samples sintered from nanoparticles obtained by grinding of previously synthesized SrTiO3 and nanoparticles obtained by chemical deposition were studied in the temperature range 10–300 K. The first sample shows the characteristic features of a relaxor ferroelectric. The dispersion of the dielectric response observed in the vicinity of 40 K is characterized by two relaxation processes, with broad spectra of relaxation times. It is assumed that the “high-temperature” relaxation process is associated with the dynamics of the elastic domain. Possible mechanisms for the interaction of elastic deformation and polarization are discussed.

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来源期刊

Ferroelectrics Letters Section 物理-物理：凝聚态物理

CiteScore

1.10

自引率

0.00%

发文量

审稿时长

4.8 months

期刊介绍： Ferroelectrics Letters is a separately published section of the international journal Ferroelectrics. Both sections publish theoretical, experimental and applied papers on ferroelectrics and related materials, including ferroelastics, ferroelectric ferromagnetics, electrooptics, piezoelectrics, pyroelectrics, nonlinear dielectrics, polymers and liquid crystals. Ferroelectrics Letters permits the rapid publication of important, quality, short original papers on the theory, synthesis, properties and applications of ferroelectrics and related materials.