纵向磁棘轮中的巨粒子横向扩散
Giant transversal particle diffusion in a longitudinal magnetic ratchet
摘要：
我们研究了顺磁粒子在单轴石榴石薄膜上的横向运动，在振荡磁场中表现出纵向棘轮效应。在没有场的情况下，通过视频显微镜获得的热扩散系数为$D_{0}\approx 3\times 10^{-4}$ $μm^2/s$。随着领域，横向扩散表现出巨大的增强近四十年和一个显着的最大值作为驱动频率的函数。我们解释的实验结果与理论解释的随机无序效应的磁膜内。
英文摘要：
We study the transversal motion of paramagnetic particles on a uniaxial garnet film, exhibiting a longitudinal ratchet effect in the presence of an oscillating magnetic field. Without the field, the thermal diffusion coefficient obtained by video microscopy is $D_{0}\approx 3\times 10^{-4}$ $μm^2/s$. With the field, the transversal diffusion exhibits a giant enhancement by almost four decades and a pronounced maximum as a function of the driving frequency. We explain the experimental findings with a theoretical interpretation in terms of random disorder effects within the magnetic film.
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