Unidirectional magnetic coupling

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CWatters
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sophiecentaur
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Couldn't see this news posted elsewhere. Sound too good to be true?...

Quote: "We have created a device that behaves like a diode for magnetic fields."

https://phys.org/news/2018-11-defy-19th-century-law-physics.html

I haven't read their paper yet.
Sounds interesting but it should be treated with care without a more full description. There are 'one way' EN devices in RF Engineering (Circulators and Isolators) which force EM waves to 'go one way' but they involve dissipative elements and non-linearity.
When I read "defying the Law", I always wonder . . . .
 
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