Permanent Magnets: Factors that Reduce Magnetization

  • Thread starter Thread starter Crowxe
  • Start date Start date
  • Tags Tags
    Magnets
AI Thread Summary
Heat significantly reduces the magnetization of permanent magnets by disrupting their magnetic domains. Additionally, physical impacts, such as striking the magnet with a sledgehammer, can also diminish magnetization without breaking the magnet. Both factors contribute to the overall loss of magnetic strength in permanent magnets. Understanding these influences is crucial for maintaining magnet performance. Proper handling and storage can help preserve magnetization over time.
Crowxe
Messages
45
Reaction score
1
What factor reduce the magnetization of a perninant magnet
 
Physics news on Phys.org
Perninant?
 
Heat will adversely affect a magnet.
 
Crowxe said:
What factor reduce the magnetization of a perninant magnet

In addition to heating the magnet (mentioned above), I think that banging the magnet with a sledge hammer (without breaking the magnet into pieces) will reduce the magnetization by breaking up some of the magnetic domains in the magnetized metal or ceramic material.
 
Borek said:
Perninant?

Spilling mistake with predictive writing (T9) on mobile :) permanent
 
pallidin said:
Heat will adversely affect a magnet.

Thanks :)
 
Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'
So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...
It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.
Back
Top