MAGNETIC MICROSCOPY USING A LIQUID-NITROGEN COOLED YBA2CU3O7 SUPERCONDUCTING QUANTUM INTERFERENCE DEVICE

被引：118

作者：

BLACK, RC

MATHAI, A

WELLSTOOD, FC

DANTSKER, E

MIKLICH, AH

NEMETH, DT

KINGSTON, JJ

CLARKE, J

机构：

[1] UNIV CALIF BERKELEY,DEPT PHYS,BERKELEY,CA 94720

[2] LAWRENCE BERKELEY LAB,DIV MAT SCI,BERKELEY,CA 94720

来源：

APPLIED PHYSICS LETTERS | 1993年 / 62卷 / 17期

关键词：

D O I：

10.1063/1.109448

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We have developed a magnetic flux microscope which uses a liquid nitrogen cooled thin-film YBa2Cu3O7 dc superconducting quantum interference device (SQUID) to produce two-dimensional images of magnetic fields. The instrument operates as a scanning probe microscope with a spatial resolution of about 80 mum and a field of view of about 100 mm2. The equivalent magnetic field noise in the SQUID ranges from 80 pT Hz-1/2 at 1 Hz to 20 pT Hz-1/2 at 1 kHz, yielding a field resolution of about 200 pT in our images. We have used the microscope to image magnetic domains in ferromagnetic samples, small currents flowing in fine wires, and trapped flux and diamagnetic susceptibility in superconducting thin films.

引用

页码：2128 / 2130

页数：3

共 15 条

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