Physicists Build World's First "Magnetic Hose" For Transmitting Magnetic Fields: Navau and co point out that a static magnetic field can be thought of as a wave with an infinite wavelength so in theory it ought to be possible to control it with a metamaterial in the same way as electromagnetic waves...
Their conclusion is that a “magnetic hose” consisting of concentric tubes of superconducting and ferromagnetic materials ought to do the trick. They say that a tube consisting of 20 concentric rings that is about ten times longer than it is wide, should transmit about 90 per cent of a magnetic field at one end to the other. Indeed, a tube of just 2 concentric rings should transmit about 75 per cent.
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