MadSci Network: Physics

Re: A question on magnets and their properties

Date: Sat Jan 6 11:17:17 2007
Posted By: Prater Brian D., Staff, Magnetics, Cavetronics R&D labs
Area of science: Physics
ID: 1166194175.Ph

Normal pieces of matter are composed of particles such as protons, 
neutrons, and electrons; and all of these have the fundamental property of 
quantum mechanical spin. Spin gives each one of these particles an 
associated magnetic field. 

"Domains" can be likened to microscopic neighborhoods in which there 
is a strong reinforcing interaction between particles, and as a result, a 
great deal of order. The greater the degree of ordering within and between 
domains, the greater the resulting field will be. " gauss = force of the 
magnetic field"

Electrons play the primary role in generating a magnetic field. Within an 
atom, electrons can exist either individually or in pairs within any given 
orbital. When they are paired, the individuals in that pair always have 
opposite spin: one up, one down. The fact that the spins have opposite 
orientation means that the two cancel one another. If all electrons are 
paired, no net magnetic field will be generated.

"do magnets also have a range of frequencies that 
they operate at?"

Yes they work on atomic frequencies and spin polarize "like a magnet's 

There are some new type of magnets that we can control its gauss and polar 
effects, we use electromagnets and the newest form of controlling magnets 
is using different colored light like "blue and green"

"Photoinduced Magnetization in the Organic-Based Magnet Mn(TCNE)x," 
Physical Review Letters

Placing the item in an external magnetic field will result in the item 
retaining some of the magnetism on removal. Vibration has been shown to 
increase the effect. Ferrous materials aligned with the earth's magnetic 
field and which are subject to vibration (e.g. frame of a conveyor) have 
been shown to acquire significant residual magnetism. 

We use micro-waves to heat food and RF waves to talk on our cell phones; 
all are one of the same "magnetic fields" [note added by MadSci Admin:
Strictly speaking they are electromagnetic fields.]

I do hope this helps

Brian Prater

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