HTS SQUID microscope head with sharp permalloy rod for high spatial resolution

Author

Nagaishi, Tatsuoki ; Minamimura, Kenichi ; Itozaki, Hideo

Author_Institution

Sumitomo Electr. Hightechs, Hyogo, Japan

Volume

11

Issue

1

fYear

2001

fDate

3/1/2001 12:00:00 AM

Firstpage

226

Lastpage

229

Abstract

Spatial resolution with a sharp permalloy rod on an HTS SQUID microscope head was investigated. A 5 mm diameter and 10 mm long permalloy rod with one side sharp and one side flat is placed In front of a washer type SQUID with 0.1 mm spacing. A 0.3 mm line and space meander line on a printed circuit board carrying current was used as a magnetic field source. The SQUID microscope head with the sharp permalloy rod scanned two dimensionally on the meander line inside the magnetic shield. The 0.3 mm line and space meander line was resolved. We also demonstrated imaging of laser-printed characters. This method has the advantage of using a washer type SQUID with high magnetic sensitivity, high spatial resolution and facilitating the adjustment of the position and the measurement distance from the sample

Keywords

SQUIDs; high-temperature superconductors; magnetic field measurement; magnetic sensors; scanning probe microscopy; 10 mm; 5 mm; HTS SQUID microscope head; NiFe; laser-printed characters; magnetic shield; meander line; measurement distance; sensitivity; sharp permalloy rod; spatial resolution; washer type SQUID; Glass; High temperature superconductors; Magnetic field measurement; Magnetic heads; Magnetic materials; Magnetic separation; Magnetic shielding; Microscopy; SQUIDs; Spatial resolution;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.919325

Filename

919325