Question

THE EFFECT OF TEMPERATURE ON MAGNETIC FLUX DENSITY IS WELL ESTABLISHED. HOWEVER I AM UNABLE TO FIND AN EXACT EQUATION FOR THE RELATIONSHIP BETWEEN B-FIELDS AND TEMPERATURE.

If you know one please take a second to just let me know. wont take long :)

THANKS A LOT FELLOW PHYSICISTS :D

Answer 1

Didn't know it was a well known fact.....maybe not so obvious to the casual observer!

Answer 2

@TheNewNewton

I assume you are referring to the temperature dependence of the magnetic properties of materials.

Magnetic Flux Density has temperature dependence insofar as the material which contributes to it does. \[B = \mu _{0}(H +M)\]
For paramagnetic materials Curies Law states
\[M=C(\frac{ H }{ T } )\]
where C is the Curie Constant and T the temperature

Where H is the applied magnetic field intensity and M is the magnetization of the material.

The Curie temperature, is the temperature at which a magnet looses its normal magnetic properties and undergoes a phase transition from to one of induces magnetism i.e., a radical departure from a dependence of M. The general temperature dependence of the properties of magnetic materials is probably only know by the cognoscente of Quantum Statistical Mechanics if at that.

Answer 3

Glad someone provided some enlightenment. Worked many years with magnetrons and amplitrons which had powerful permanent magnets (cross field devices) and I often wondered what affect temperature had on those tubes.