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Image and sample geometry effects in SQUID magnetometers.

Author(s) : ZIEBA A.

Type of article: Article

Summary

This review concerns the interpretation of the signal provided by SQUID magnetometers designed for measurements of magnetization and magnetic susceptibility. "Image effects" refers to the influence of a superconducting shield in the vicinity of the sample and detection coil. Several methods are presented for calculation of the device sensitivity. A survey of complex detection coils is included. The image effects due to the properties of the SQUID circuit are discussed, as well as changes in the instrument calibration due to sample geometry. A spherical harmonic expansion of the device sensitivity makes it possible to derive simple formulas for samples with regular geometries. The results are compared to published experimental data.

Details

  • Original title: Image and sample geometry effects in SQUID magnetometers.
  • Record ID : 1994-2735
  • Languages: English
  • Source: Rev. sci. Instrum. - vol. 64 - n. 12
  • Publication date: 1993/12
  • Document available for consultation in the library of the IIR headquarters only.

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