ONE-DIMENSIONAL MAGNETIC-FLUX MICROSCOPE BASED ON THE DC SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE

被引：47

作者：

MATHAI, A

SONG, D

GIM, Y

WELLSTOOD, FC

机构：

[1] Center for Superconductivity Research, Department of Physics, University of Maryland, College Park

来源：

APPLIED PHYSICS LETTERS | 1992年 / 61卷 / 05期

关键词：

D O I：

10.1063/1.107848

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have designed and operated a magnetic flux microscope which measures the magnetic field above a sample surface by scanning a 4.2 K thin-film dc superconducting quantum interference device (SQUID) along one direction. With the SQUID and sample separated by about 160-mu-m, the system can image features with a spatial resolution of about 220-mu-m and a magnetic field resolution of 1.8 X 10(-13) THz-1/2. We have used the system to view trapped magnetic flux, to image thin-film strips of superconducting Pb in field strengths of 0-750 nT, and to monitor the position of a sample with a resolution of approximately 0.5 nm Hz-1/2 at a frequency of 4 kHz.

引用

页码：598 / 600

页数：3

共 13 条

[1] On inhomogeneities in the magnetization of ferromagnetic materials [J].