Portable DC SQUID based magnetic susceptibility meter

Author

Khanin, V.V. ; Sotnikova, J.N. ; Slobodchikov, V.Y. ; Matlashov, A.N.

Author_Institution

Moscow State Univ., Russia

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

2149

Lastpage

2151

Abstract

The device is designed as a top-loading system for operation in a storage helium dewar with a 1 1/4" dia neck. Sample temperature is regulated in the range of 4.2-300 K using gaseous helium fed from a helium bath. The sample diameter is up to 4.0 mm, the maximum magnetizing field 0.18 T, the magnetic moment resolution 5/spl times/10/sup -12/ A/spl times/m/sup 2/. The high sensitivity of the instrument makes it possible to investigate the magnetic susceptibility of 1 mm/spl times/1 mm HTc thin films as a function of temperature in a transverse magnetic field of about 10/sup -3/ T. The provisions for measuring the magnetizing field with the help of a Hall sensor enable samples to be cooled down in the fields below 10/sup -5/ T to measure the Meisner effect.<>

Keywords

Meissner effect; SQUID magnetometers; high-temperature superconductors; magnetic susceptibility; portable instruments; superconducting thin films; 1E-5 to 0.18 T; 4.0 mm; 4.2 to 300 K; HTc thin films; Hall sensor; He; Meisner effect; gaseous helium; helium bath; magnetic moment resolution; magnetizing field; portable DC SQUID based magnetic susceptibility meter; sensitivity; storage helium dewar; top-loading system; Magnetic field measurement; Magnetic moments; Magnetic sensors; Magnetic susceptibility; Neck; SQUIDs; Temperature distribution; Temperature sensors; Thin film sensors;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.403008

Filename

403008