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Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
It is very possible to levitate something above a magnet...
I will admit that black wasn't the best choice of background, but when you click the link the graphite is levitating ~1mm above the bock of 4 magnets quite stable (I promise that there isn't anything above)
Also works great the other way if you use a superconductor instead of the graphite (but I don't have any LN2 to get my superconductor puck going atm, so you will just have google it)
I suppose if you paved the roads with superconductors you could...
Registered Member #195
Joined: Fri Feb 17 2006, 08:27PM
Location: Berkeley, ca.
Posts: 1111
I ran into a website that was selling neodinium magnets and they were suspending a small neo magnet betwean two peaces of bismith and they said that bismith has antimagnetic propertys. Has any body checked this out or tried this. N.B.
Registered Member #56
Joined: Thu Feb 09 2006, 05:02AM
Location: Southern Califorina, USA
Posts: 2445
That works too, but you need to have a strong magnet above the setup. I don't have the thing set up atm, but if you really want to see it work I could put it together. You need to have a large magnet above the setup that provides the bulk of the lift, and then the last little bit is provided by the graphite.
To give you an idea of the 'efficiency' using one my 3/8" cube magnets ~2" above the small magnet I could levitate a .1" cube magnet ~1.5mm above a piece of graphite. I should point out that there is a very small (talking a for .001ths of an inch) 'sweet spot' that lets the magnet levitate, too close and the little magnet shoots up to the big one, too far and the magnet just sits there. Once you hit the sweet spot it is somewhat stable, however blowing on the magnet causes it to die.
Registered Member #160
Joined: Mon Feb 13 2006, 02:07AM
Location: Melbourne, Australia
Posts: 938
teravolt wrote ...
I ran into a website that was selling neodinium magnets and they were suspending a small neo magnet betwean two peaces of bismith and they said that bismith has antimagnetic propertys. Has any body checked this out or tried this. N.B.
Bismuth has a very high negative magnetic susceptibility, in other words, diamagnetic. It will take on the same pole as it's presented with, therefore repelling.
Another way I heard of to make a levitating object is to wind a coil of say 1mm wire 250mm diameter, about 50 or more turns. Put it over an aluminium plate and plug it into the mains. Gets hot really quick but levitates over the plate.
Registered Member #10
Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
I have made a diamagnetic levitation unit with Bismuth. First pic. Also a coil levitating above a copper plate. Second pic. I hope to get some pyrolytic graphite sometime to make the other diamagnetic demo. I haven't been successful with the Levitron. What I want is "pure" levitation though with a simple static object above another. Surely there must be a picture somewhere.
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Levitating a disk upwards
