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首页> 外文期刊>Physics - Uspekhi >Dislocation kinetics in nonmagnetic crystals: a look through a magnetic window
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Dislocation kinetics in nonmagnetic crystals: a look through a magnetic window

机译：非磁性晶体的位错动力学：通过磁窗眼看

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摘要

We discuss new kinematic magnetoplasticity features established experimentally and by simulations. We examine the motion of a dislocation through randomly distributed point defects under the influence of a magnetic field that reduces the impurity pinning forces. In addition to the measurable characteristics of motion, hidden motion parameters amenable only to simulation studies are investigated for the first time. It is shown that the distribution of stoppers on a dislocation is independent of the impurity concentration C, whereas the average number of stoppers and the critical force for the dislocation breakaway are proportional to root C. A model is proposed that for the first time explains the observed concentration dependence of the average dislocation speed in a magnetic field, nu alpha 1/ root/C. The model suggests that there is hidden room for an orders-of-magnitude increase in v, something which was already realized in NaC1 crystals additionally subjected to a weak electric field.
机译：我们讨论了通过实验和模拟建立的新的运动磁塑性特征。我们研究了在减少杂质钉扎力的磁场影响下，位错通过随机分布的点缺陷的运动。除了可测量的运动特性外，首次研究了仅适用于仿真研究的隐藏运动参数。结果表明，位错上的止动块分布与杂质浓度C无关，而止动块的平均数量和位错断裂的临界力与根C成正比。提出了一个模型，首次解释了在磁场中观察到的平均位错速度的浓度依赖性，nu alpha 1/root/C。该模型表明，v有一个数量级增加的隐藏空间，这在另外受到弱电场的NaCl晶体中已经实现。

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