Non-contact measurement of diamagnetic susceptibility change by a magnetic levitation technique

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4 Citations (Scopus)

Abstract

A new method for measuring the temperature dependence of the diamagnetic susceptibility is described. It is based on the Faraday method and employs a magnetic levitation technique. The susceptibility of a magnetically levitating diamagnetic sample is determined from the product of the magnetic flux density and the field gradient at the levitating position observed using a micro CCD camera. The susceptibility of a sample during containerless melting and solidification can be measured to a precision of better than ±0.05%. The temperature dependence of the susceptibility of paraffin wax was measured by the magnetic levitation technique with an accuracy of ±0.25%. This method enables sensitive and contactless measurements of the diamagnetic susceptibility across the melting point with in situ observations.

Original languageEnglish
Article number035703
JournalMeasurement Science and Technology
Volume22
Issue number3
DOIs
Publication statusPublished - 2011 Mar

Keywords

  • Diamagnetic susceptibility
  • Magnetic levitation
  • Precise measurement

ASJC Scopus subject areas

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

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