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A low field SQUID magnetometer system for magnetic characterization of high- T sub c superconducting samples

Journal Article · · Review of Scientific Instruments; (United States)
DOI:https://doi.org/10.1063/1.1142348· OSTI ID:5385752
 [1];  [2];  [3];  [4]
  1. Department of Physics, University of Illinois at Chicago, Chicago, Illinois (USA) Science and Technology Center for Superconductivity, and Materials Science Division, Argonne National Laboratory, Argonne, Illinois (USA)
  2. Department of Physics, University of Illinois at Chicago, Chicago, Illinois (USA)
  3. Department of Physics, University of Illinois at Chicago, Chicago, Illinois (USA) Materials Science Division, Argonne National Laboratory, Argonne, Illinois (USA)
  4. Materials Science Division, Argonne National Laboratory, Argonne, Illinois (USA)
+ Show Author Affiliations
In this article we describe a simple SQUID magnetometer system useful for the magnetic characterization of high temperature superconductors. The system employs a commercial rf SQUID probe with associated electronics located in a {sup 4}He gas exchange cryostat. The system is equipped with a copper coil dc magnet for fields up to 50 Gauss. The cryostat is surrounded by a {mu}-metal shield that keeps the remanent field to less than 20 mGauss. The apparatus has been used extensively to measure both the superconducting transition temperature and width as well as the relative quantities of magnetic flux expulsion and exclusion. It has therefore served as an important first step in the evaluation of sample quality.
Research Organization:
Argonne National Laboratory (ANL), Argonne, IL
DOE Contract Number:
W-31109-ENG-38
OSTI ID:
5385752
Journal Information:
Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 62:9; ISSN RSINA; ISSN 0034-6748
Country of Publication:
United States
Language:
English

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Related Subjects

426001* -- Engineering-- Superconducting Devices & Circuits-- (1990-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CONTROL EQUIPMENT
CRYOSTATS
ELECTRONIC EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
FLUXMETERS
HELIUM 4
HELIUM ISOTOPES
HIGH-TC SUPERCONDUCTORS
ISOTOPES
LIGHT NUCLEI
MAGNETIC FLUX
MAGNETIC PROPERTIES
MAGNETOMETERS
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NUCLEI
PHYSICAL PROPERTIES
SQUID DEVICES
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
THERMODYNAMIC PROPERTIES
THERMOSTATS
TRANSITION TEMPERATURE