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Physics, Astronomy & Cosmology / Re: Sudden polarity reversal in opposing permanent magnets?

« on: 25/05/2020 00:30:05 »

With you now. Yes it's clear there is no permanent polarity reversal or full demagnetisation.

Situation appears like a temporary one, but I agree that does not make sense since they are identical factory-produced magnets. Thus the original post.

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Physics, Astronomy & Cosmology / Re: Sudden polarity reversal in opposing permanent magnets?

« on: 24/05/2020 21:29:18 »

Petrochemicals, I'm not following your question. I'm working with two permanent magnets, so not alterable in any way.

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Physics, Astronomy & Cosmology / Re: Sudden polarity reversal in opposing permanent magnets?

« on: 22/05/2020 23:27:35 »

I have tried that previously, and just did it again many times for the sake of confirming - they will snap together at any rotational alignment. I notice that it is more difficult (requires more force) in some alignments, but the apparent polarity change happens regardless. It's weird!

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Physics, Astronomy & Cosmology / Sudden polarity reversal in opposing permanent magnets?

« on: 22/05/2020 20:09:14 »

Hi all,

I'm working with a pair of multi-pole neodymium ring magnets (rated ~119lbF, McMaster-Carr part number 2494N17) and finding that if the opposing poles are forced together, with the magnets in alignment, that at very close range (may be a millimeter or two apart?) the two magnets will suddenly snap together as if one has reversed polarity. There is NO electric current involved, but the only resources I am finding about this phenomenom are related to electromagnets and induced magnetism.

Can anyone point me to a source explaining what's happening?

Thank you!