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Scanning superconducting quantum interference device susceptometry

Rev. Sci. Instrum. 72, 2361 (2001); doi:10.1063/1.1364668

Issue Date: May 2001

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Brian W. Gardner, Janice C. Wynn, Per G. Björnsson, Eric W. J. Straver, and Kathryn A. Moler
Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305

John R. Kirtley and Mark B. Ketchen
IBM T. J. Watson Research Center, P.O. Box 218, Yorktown Heights, New York 10598
We report a scanning superconducting quantum interference device (SQUID) microsusceptometer with a spatial resolution of 8 µm, tested by measuring the susceptibility of individual 3 µm diam tin disks. Images of the disks agree well with numerical modeling based on the known geometry of the SQUID microsusceptometers. The low-field spin sensitivity between 1.5 and 6 K is 1×105 µB/sqrt(Hz) while scanning. ©2001 American Institute of Physics.
History: Received 14 August 2000; accepted 18 February 2001
Permalink: http://link.aip.org/link/?RSINAK/72/2361/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.55.Jg
    Instruments, apparatus, and components common to several branches of physics and astronomy Magnetic instruments and components Magnetometers for susceptibility, magnetic moment, and magnetization measurements
  • 85.25.Dq
    Electronic and magnetic devices; microelectronics Superconducting devices Superconducting quantum interference devices (SQUIDs)
  • 07.20.Mc
    Instruments, apparatus, and components common to several branches of physics and astronomy Thermal instruments and apparatus Cryogenics; refrigerators, low-temperature equipment
  • YEAR: 2001

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ISSN:
0034-6748 (print)   1089-7623 (online)
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REFERENCES (11)
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