论文标题
单个fe $ _3 $ o $ $ _4 $纳米粒子的多个串行屏障的磁化逆转
Magnetization Reversal Across Multiple Serial Barriers in a Single Fe$_3$O$_4$ Nanoparticle
论文作者
论文摘要
纳米级磁纹理（例如域壁，涡流和天空）的含量对磁性存储和信息处理至关重要。我们使用微米尺度的超导量子干扰装置来测量单个非单个域Fe $ _4 $ nanoparticle的时间分辨磁开关统计。令人惊讶的是，与单个屏障预期的指数分布相比，观察到达到最终状态之前的等待时间分布的强烈缩小。因此，跨纳米结构的磁化反转显示是最小能量途径中的多个串行屏障引起的。
Depinning of nanoscale magnetic textures, such as domain walls, vortices and skyrmions, is of paramount importance for magnetic storage and information processing. We measure time-resolved magnetic switching statistics of an individual, non-single-domain Fe$_3$O$_4$ nanoparticle using a micrometer-scale superconducting quantum interference device. Surprisingly, a strong narrowing of the waiting-time distributions before reaching the final state is observed as compared to the exponential distribution expected for a single barrier. The magnetization reversal across the nanostructure is thus shown to result from multiple serial barriers in the minimum energy pathway.
