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arXiv 2104.05935cond-mat.stat-mech
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速度突变下磁摩擦的弛豫过程

Relaxation process of magnetic friction under sudden changes in velocity

Hisato Komatsu

摘要:

虽然已经有许多关于磁摩擦统计力学模型的研究,但大多数都集中在稳态下的行为。在这项研究中,我们准备了一个系统组成的一个链和一个晶格的伊辛自旋相互作用,并调查系统的弛豫时,相对速度$v$突然改变。给定$v$的情况是通过将链条连接到弹簧上来实现的,弹簧的另一端以恒定速度$v$移动。数值模拟发现,当弹性常数取一个中等值时,摩擦力的松弛分为突变和缓慢松弛两个过程。这种行为也在规则的固体表面上观察到,尽管是由与我们的模型不同的因素引起的。更具体地说,在我们的模型中,缓慢的弛豫过程是由磁结构的弛豫引起的,但在规则的固体表面中是由蠕变变形引起的。

英文摘要:

Although there have been many studies of statistical mechanical models of magnetic friction, most of these have focused on the behavior in the steady state. In this study, we prepare a system composed of a chain and a lattice of Ising spins that interact with each other, and investigate the relaxation of the system when the relative velocity $v$ changes suddenly. The situation where $v$ is given is realized by attaching the chain to a spring, the other end of which moves with a constant velocity $v$. Numerical simulation finds that, when the spring constant has a moderate value, the relaxation of the frictional force is divided into two processes, which are a sudden change and a slow relaxation. This behavior is also observed on regular solid surfaces, although caused by different factors than our model. More specifically, the slow relaxation process is caused by relaxation of the magnetic structure in our model, but is caused by creep deformation in regular solid surfaces.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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