In Search of the lost magnetic property.
In Search of the lost magnetic property.
(OP)
In the 1950's while disassembling speakers from old radios I came across one pole piece that was not attracted to the magnet but concentrated magnetic flux. Recently while searching for the alloy I have been informed the memory must be false because magnetic conductivity depends on the material being magnetizable.
However I clearly remember sandwiching the pole piece between a magnet and a steel washer, turning it upside down and marveling that it fell apart as soon as the washer was removed.
If the material exists, what alloy could it be, and why do so many believe, it's not possible?
However I clearly remember sandwiching the pole piece between a magnet and a steel washer, turning it upside down and marveling that it fell apart as soon as the washer was removed.
If the material exists, what alloy could it be, and why do so many believe, it's not possible?





RE: In Search of the lost magnetic property.
I don't know if your recollection is accurate and whether you tested your premise rigorously.
TTFN
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RE: In Search of the lost magnetic property.
Hmmm. I could do that with a piece of wood or a piece of plastic. Or a piece of paper between a refrigerator and a manget. Am I missing something?
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RE: In Search of the lost magnetic property.
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RE: In Search of the lost magnetic property.
At very high frequencies the permeability of even steel could drop near zero. Is this your thinking?
Fe
RE: In Search of the lost magnetic property.
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Eng-tips forums: The best place on the web for engineering discussions.
RE: In Search of the lost magnetic property.
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Eng-tips forums: The best place on the web for engineering discussions.
RE: In Search of the lost magnetic property.
Fe
RE: In Search of the lost magnetic property.
TTFN
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RE: In Search of the lost magnetic property.
w.r.t. the frequency dependence:
As a rule, the permeability decreases with frequency (not linearly, it's generally constant with steps down as different mechanisms drop out. It's analogous to permittivity).
This material, if it existed, would be very useful today, and I doubt we would lose track of it. My guess is that there is likely something lost in your memory, or that the properties were misrepresented to you.
RE: In Search of the lost magnetic property.