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首页> 外文期刊>Physica Scripta: An International Journal for Experimental and Theoretical Physics >Importance of damping on nanoswitching in LiNbO3-type ferroelectrics
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Importance of damping on nanoswitching in LiNbO3-type ferroelectrics

机译：LiNbO3型铁电体中阻尼对纳米开关的重要性

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摘要

In a previous dynamic study of some ferroelectric materials showing memory switching behavior, a Hamiltonian was developed that gave rise to a nonlinear Duffing oscillator equation involving the Landau-Ginzburg free energy functional as a potential formulation (Bandyopadhyay et al 2006 J. Appl. Phys. 100 114106). A high level of oscillations was observed in polarization waves against non-dimensional time that was quenched by increasing damping, which is a decay constant related to the loss of polarization due to damping during its motion in a ferroelectric material, such as lithium niobate. From the computer simulation of the damped oscillation curves, a critical time for switching, say, in a nanoswitch, was found that varies with the damping coefficient. This damping was also found to show an increasing behavior with the coercive field or the amount of impurities in a quadratic manner in such ferroelectrics.
机译：在先前的一些显示出存储器开关行为的铁电材料的动态研究中，开发了哈密顿量（Hamiltonian），从而产生了一个非线性的Duffing振荡器方程，其中涉及Landau-Ginzburg自由能函数（Bandyopadhyay et al 2006 J.Appl。 100 114106）。在极化波中，相对于无量纲的时间观察到了高水平的振荡，该振荡通过增加阻尼来消除，该衰减是与在铁电材料（如铌酸锂）中运动期间由于阻尼引起的极化损失有关的衰减常数。从阻尼振荡曲线的计算机模拟中，发现开关的临界时间（例如，在纳米开关中）随阻尼系数而变化。还发现在这种铁电体中，这种阻尼随着矫顽场或杂质数量的增加呈二次方增加的行为。

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