用于测量各向异性磁阻和旋转磁光克尔效应的矢量磁体的设计。

Design of a vector magnet for the measurements of anisotropic magnetoresistance and rotational magneto-optic Kerr effect.

作者信息

Li J, Jin E, Son H, Tan A, Cao W N, Hwang Chanyong, Qiu Z Q

机构信息

Department of Physics, University of California at Berkeley, Berkeley, California 94720, USA.

出版信息

Rev Sci Instrum. 2012 Mar;83(3):033906. doi: 10.1063/1.3698297.

DOI:10.1063/1.3698297

PMID:22462937

Abstract

A vector magnet is designed and assembled with two electromagnets to produce a rotational magnetic field in any direction within a plane. This design allows a rotation of the magnetic field without a mechanical rotation of the magnets. The fast speed of the field rotation (~10 s for a complete 360° rotation) and the stability against mechanical vibration easily overcome the slow drifting effect in anisotropic magnetoresistance (AMR) and rotational magneto-optic Kerr effect (ROTMOKE) measurements. As an example we applied this vector magnet to carry out AMR and ROTMOKE measurements on epitaxial growth of Fe(10 nm)∕MgO(001) films. The result demonstrates the stability and high quality of the vector magnet in determining the magnetic anisotropy of magnetic thin films using AMR and ROTMOKE techniques.

摘要

一种矢量磁体由两个电磁铁设计并组装而成，用于在平面内的任何方向产生旋转磁场。这种设计允许磁场旋转而无需磁体进行机械旋转。磁场旋转速度快（完整360°旋转约需10秒）且对机械振动具有稳定性，这很容易克服各向异性磁阻（AMR）和旋转磁光克尔效应（ROTMOKE）测量中的缓慢漂移效应。作为一个例子，我们应用这种矢量磁体对Fe(10纳米)/MgO(001)薄膜的外延生长进行AMR和ROTMOKE测量。结果证明了该矢量磁体在使用AMR和ROTMOKE技术确定磁性薄膜磁各向异性方面的稳定性和高质量。