Vestgården J I, Shantsev D V, Olsen A A F, Galperin Y M, Yurchenko V V, Goa P E, Johansen T H
Department of Physics and Center for Materials Science and Nanotechnology, University of Oslo, P.O. Box 1048, Blindern, 0316 Oslo, Norway.
Phys Rev Lett. 2007 Mar 16;98(11):117002. doi: 10.1103/PhysRevLett.98.117002. Epub 2007 Mar 13.
A theoretical model for how Bloch walls occurring in in-plane magnetized ferrite garnet films can serve as efficient magnetic micromanipulators is presented. As an example, the walls' interaction with Abrikosov vortices in a superconductor in close contact with a garnet film is analyzed within the London approximation. The model explains how vortices are attracted to such walls, and excellent quantitative agreement is obtained for the resulting peaked flux profile determined experimentally in NbSe(2) using high-resolution magneto-optical imaging of vortices. In particular, this model, when generalized to include charged magnetic walls, explains the counterintuitive attraction observed between vortices and a Bloch wall of opposite polarity.
本文提出了一个理论模型，用于解释面内磁化铁氧体石榴石薄膜中出现的布洛赫壁如何作为高效的磁性微操纵器。作为一个例子，在伦敦近似下分析了这些壁与与石榴石薄膜紧密接触的超导体中的阿布里科索夫涡旋的相互作用。该模型解释了涡旋如何被吸引到这样的壁上，并且对于使用涡旋的高分辨率磁光成像在NbSe₂中通过实验确定的所得峰值通量分布，获得了出色的定量一致性。特别地，当该模型推广到包括带电磁壁时，它解释了在涡旋和相反极性的布洛赫壁之间观察到的违反直觉的吸引力。
