Reversible Permanent Magnet created at MIT

[khabe]

Is it big mystery you can drive or overdrive small permanent magnet with times bigger electromagnet? Look at these tini magnets and then huge amount of iron and coil teams up this magnetic circuit. When to try MEG with this then these small magnets will do nothing recognizable - "reverse" will take more energy than magnets are able to give back. This is inconsequent amount of energy you can get with so tiny magnets via induction. And PM motor? Oh dear! Why I need to add this monstrum to my nice, compact, powerful and near 95% efficient motor?
Thats because this (exact this) experiment does not impress me. I dont see any usage for this device.
This is not criticism!
Just my opinion,
Cheers,
khabe

[AB Hammer]

Am I missing something? It looks like the typical electromagnet effect. Power on it attracts, power off it drops. I have seen much more interesting test with magnets like dropping a magnet down a copper tube and it takes a little time to go down.

[eavogels]

Yes, you missed something (perhaps the text?): they only gave a pulse that switched the magnet on.
Eric

[AB Hammer]

Yes, you missed something (perhaps the text?): they only gave a pulse that switched the magnet on.
Eric

@eavogels

Yes I saw the text, but the reason I said what I said is. I didn't see the repel after switching, only a cut off. A magnet attracts or repels when you turn them around, and I only saw in the demos a drop similar to an electromagnet effect.

[ChileanOne]

I have been having trouble to reply to this thread.

I took a peek at the thesis of the person who created this video, and interestingly she (I assume is a she by the name) is researching "Programable materials" that answer to electromagnets by changing their properties. She created this programable magnet thinking on new materials for data storage, I think. She is a completely mainstream scientist, nothing to see with FE, I guess that she has not even thought of the possibility.

About this material that can be switched off and on, it clearly states that it only requires a pulse, not a sustained electricity, to "activate" or "deactivate" the permanent magnetism in the material.