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Old thread, but if this did work, it would be like trying to walk on water wearing arm flotation devices on your feed, you'd fall over.
Also where do you live that you think you'd have just tons of metal to walk over?
Well, superconductors hit the theoretical maximum of µ = 0 or xm = -1, compared to bismuth's xm = -1.16×10-4.
I don't know any obvious reason why you couldn't design a room temperature material (or metamaterial) with a susceptibility of -0.1 or -0.5, i.e., a large but non-superconducting value.
However, I'm not a condensed matter physicist, so there may be good theoretical or pragmatic reasons why not.
Posted:Jan 8, 2009
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