Electron spin and magnetic permeability

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SUMMARY

The discussion centers on the relationship between oscillating magnetic fields and the behavior of unpaired electrons in paramagnetic materials. It concludes that while magnetic permeability is frequency-dependent, the spin of electrons does not alter in sync with the oscillating field; instead, electrons change polarity. This indicates that complex permeability plays a crucial role in understanding electromagnetic wave propagation through such materials, particularly at frequencies above microwave levels.

PREREQUISITES
  • Understanding of paramagnetic materials
  • Familiarity with complex permeability in electromagnetism
  • Knowledge of quantum mechanics, particularly electron spin
  • Basic principles of electromagnetic wave propagation
NEXT STEPS
  • Study the concept of complex permeability in electrical engineering
  • Explore the effects of frequency on magnetic permeability
  • Learn about quantum mechanics and electron spin behavior
  • Investigate the relationship between electromagnetic waves and material properties
USEFUL FOR

Physicists, electrical engineers, and students interested in electromagnetism and quantum mechanics will benefit from this discussion, particularly those focusing on the interaction of electromagnetic fields with materials.

wospin
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Well,
This is my first post, I used to read topics here, time to make one!

Consider we have an oscillating magnetic field acting on a paramagnetic material, would this cause the unpaired electrons to alter their spin with the same frequency ?
If so, would this affect the magnetic permeability ?
in other words would it affect EM waves propagating through this medium ?
And what are the equations describing this effect?
 
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Magnetic permeability is not constant but rather changes with frequency, this is called complex permeability, it has some applications in electrical engineering.

as for the equations you can find here
http://en.wikipedia.org/wiki/Permeability_(electromagnetism )

I don't think that the spin will be altered by the same frequency, electrons tend to change their polarity rather than spin, i think spin is indeterminate in QM, so you'll be dealing with probabilistic functions, something that is not representable in classical electromagnetism.
 
Last edited by a moderator:
So, if the frequency of the magnetic field oscillation is higher than microwave frequency, would this cause reflection ?
 

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