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Measurement of the magnetic dipole moment of ferromagnetic material specimens.

Hall, M; Bartholomew, J G; Henderson, L C A (2001) Measurement of the magnetic dipole moment of ferromagnetic material specimens. NPL Report. CETM 31

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Abstract

The intrinsic magnetic properties of ferromagnetic materials can be determined in accordance with the written IEC 60404 standards. When the material is used as a component, a demagnetisation correction may need to be applied to these intrinsic properties. This is difficult to determine since it depends not only on the geometry of the component but also the magnetic permeability. For permanent magnetic materials, it is possible to measure the magnetic dipole moment, a parameter that is dependant on the material properties and the geometry. This provides important complementary component information. In this report, measurement methods for determining magnetic dipole moment are introduced and a method resulting in uncertainties as low as 0.1% (95% confidence limit) is discussed in detail. This low level of uncertainty allows the calibration of commercial magnet moment measuring instrumentation.

Item Type: Report/Guide (NPL Report)
NPL Report No.: CETM 31
Subjects: Electromagnetics
Electromagnetics > Electromagnetic Materials
Last Modified: 02 Feb 2018 13:17
URI: http://eprintspublications.npl.co.uk/id/eprint/1909

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