A permeable material that does NOT experience a force from the magnetic field it conducts? 2

[bcavender]

A friend asked me if there were any materials that would significantly transport a magnetic flux WITHOUT being attracted or repelled by the source of magnetism.

My quick response to this question was 'Not in my experience'. Like a switched reluctance alternator, energy must go into the rotor to force the switching ... so this kinda random question seemed physics-impossible to my mind just on it's face, but I caught myself wondering if some esoteric material off my beaten path might qualify for a yes answer ... as I have been surprised many times before for not being in full possession of the facts.

As expected, my search turned up nothing so I thought I would post this question here to my betters to see if my gut is on target and I haven't missed something.

Best regards,

B

 

[Compositepro]

I would say no. Some force must be exist to change a magnetic field. Then there has to be a reaction force.

 

[IRstuff]

What EXACTLY do you mean by "conducts?" There is no strict analogy for magnetic field "conduction" as if it were an electrical current. Most classical electrical insulators do not "block" magnetic fields, so they technically "conduct" a magnetic field.

If you are referring to paramagnetic or diamagnetic materials, then, by definition, they must be either attracted or repelled by the magnetic field, since the paramagnetism or diamagnetism itself is a direct consequence of the external magnetic field, and you really can't talk about one without the other.

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