Magnetic field of ferromagnetic material

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SUMMARY

The magnetic field strength of ferromagnetic materials, such as bar magnets, is determined by the strength of the external magnetic field used to create it and the material's magnetic susceptibility. A definitive formula for calculating the magnetic field strength, denoted as B(r), is not universally established. For practical measurement, utilizing a Hall effect meter is recommended to assess the magnetic field at specific points. Alternatively, heating the magnet above its Curie point can allow for the induction of a magnetic field.

PREREQUISITES
  • Understanding of magnetic susceptibility in ferromagnetic materials
  • Familiarity with Hall effect meters and their applications
  • Knowledge of the Curie point and its significance in magnetism
  • Basic principles of magnetic field strength and measurement
NEXT STEPS
  • Research the formulas related to magnetic susceptibility in ferromagnetic materials
  • Learn how to effectively use a Hall effect meter for measuring magnetic fields
  • Study the effects of temperature on ferromagnetic materials, particularly around the Curie point
  • Explore advanced topics in electromagnetism, focusing on field induction techniques
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Physicists, materials scientists, and engineers interested in the properties and applications of ferromagnetic materials and their magnetic fields.

unchained1978
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I've searched high and low among the vast archives of the internet and have yet to find any kind of formula regarding the magnetic field strength of ferromagnetic material (i.e bar magnet... etc). Does anyone know what/if there is one? As is B(r)=...?
Thanks
 
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It really depends on (1) how strong the field used to create it was and (2) the magnetic susceptibility of the ferromagnetic material.

If you don't know those things, you can always get a Hall effect meter and measure the field at the point that you care about it. Or, if you really want to get hands-on, heat the magnet above the Curie point and induce a field yourself.
 

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