Vemulkar T, Welbourne E N, Mansell R, Petit D C M C, Cowburn R P
Cavendish Laboratory, University of Cambridge , JJ Thomson Avenue, Cambridge CB3 0HE, United Kingdom.
Appl Phys Lett. 2017 Jan 23;110(4):042402. doi: 10.1063/1.4974211. Epub 2017 Jan 24.
In this article, we demonstrate the magneto-mechanic behavior in a fluid environment of perpendicularly magnetized microdiscs with antiferromagnetic interlayer coupling. When suspended in a fluid and under the influence of a simple uniaxial applied magnetic field sequence, the microdiscs mechanically rotate to access the magnetic saturation processes that are either that of the easy axis, hard axis, or in-between the two, in order to lower their energy. Further, these transitions enable the magnetic particles to form reconfigurable magnetic chains, and transduce torque from uniaxial applied fields. These microdiscs offer an attractive platform for the fabrication of fluid based micro- and nanodevices, and dynamically self assembled complex architectures.
在本文中，我们展示了具有反铁磁层间耦合的垂直磁化微盘在流体环境中的磁机械行为。当悬浮在流体中并受到简单的单轴外加磁场序列影响时，微盘会机械旋转以进入易轴、硬轴或两者之间的磁饱和过程，从而降低其能量。此外，这些转变使磁性粒子能够形成可重构的磁链，并将单轴外加磁场的扭矩进行转换。这些微盘为基于流体的微纳器件制造以及动态自组装复杂结构提供了一个有吸引力的平台。
