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Review of Scientific Instruments / Volume 82 / Issue 7 / ARTICLES / General Instruments

Rev. Sci. Instrum. 82, 075104 (2011); http://dx.doi.org/10.1063/1.3605665 (4 pages)

Technique for high axial shielding factor performance of large-scale, thin, open-ended, cylindrical Metglas magnetic shields

S. Malkowski, R. Adhikari, B. Hona, C. Mattie, D. Woods, H. Yan, and B. Plaster

Department of Physics and Astronomy, University of Kentucky, Lexington, Kentucky 40506, USA

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(Received 27 April 2011; accepted 2 June 2011; published online 11 July 2011)

Metglas 2705M is a low-cost commercially available, high-permeability cobalt-based magnetic alloy, provided as a 5.08-cm wide and 20.3-μm thick ribbon foil. We present an optimized construction technique for single-shell, large-scale (human-size), thin, open-ended cylindrical Metglas magnetic shields. The measured dc axial and transverse magnetic shielding factors of our 0.61-m diameter and 1.83-m long shields in the Earth's magnetic field were 267 and 1500, for material thicknesses of only 122 μm (i.e., 6 foil layers). The axial shielding performance of our single-shell Metglas magnetic shields, obtained without the use of magnetic shaking techniques, is comparable to the performance of significantly thicker, multiple-shell, open-ended Metglas magnetic shields in comparable-magnitude, low-frequency applied external fields reported previously in the literature.

© 2011 American Institute of Physics

Article Outline

  1. INTRODUCTION
  2. TECHNIQUE
  3. RESULTS
  4. SUMMARY

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KEYWORDS and PACS

Keywords

cobalt alloys, geomagnetism, magnetic materials, magnetic permeability, magnetic shielding, magnetic thin films, magnetic variables measurement

PACS

  • 41.20.Gz

    Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems

  • 07.55.Nk

    Magnetic shielding in instruments

  • 75.70.-i

    Magnetic properties of thin films, surfaces, and interfaces

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.3605665

PUBLICATION DATA

ISSN

0034-6748 (print)  
1089-7623 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

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    References

    I. Sasada, S. Kubo, and K. Harada, J. Appl. Phys. 64, 5696 (1988)JAPIAU000064000010005696000001.

    I. Sasada, T. Yamamoto, and T. Yamauchi, J. Appl. Phys. 79, 5490 (1996)JAPIAU000079000008005490000001.

    I. Sasada, E. Paperno, and H. Koide, J. Appl. Phys. 87, 5962 (2000)JAPIAU000087000009005962000001.


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