Diamagnetic levitation

Diamagnetic levitation

Here’s a video of pyrolytic graphite levitating (diamagnetic levitation) over 4 12mm neodymium magnets – I have the magnets, just need to find some pyrolytic graphite, anyone know a good source? – [via] Link.

9 thoughts on “Diamagnetic levitation

  1. HoppedOnPop says:

    Scitoys will sell you a kit with magnets and everything.

    Digi -Key has some too, sold as heat sink interface material.

  2. wbeaty says:

    Use a razor knife to split some thin sheets off the thicker block sold by Scitoys.

    Also, no need to use large 1cm cube magnets. Instead cover a steel sheet with small disks, oriented in a NS checkerboard array, and the carbon will still float. Use a 2″ wide magnet array with a 1/4″ carbon sheet, and you’ve got a start on a maglev train demo.

  3. Windell_Oskay says:

    You can also use bismuth metal to allow diamagnetic levitation of a small magnet. Bismuth is cheap, easy to get, non-toxic and has a low melting point. You can cast it with a gas stove or propane torch. Bismuth is commonly sold as lead-free shot or fishing weights at “sporting goods” stores. Small quantities are usually available on eBay for about $5.

    Here are some examples of levitation with bismuth.

  4. mohitthegreat says:

    will a tin-bismuth alloy work? or must be a pure bismuth?

  5. Windell_Oskay says:

    I haven’t tried tin-bismuth alloy– Let us know if you do. It takes a steady hand with the pure stuff (or with graphite), and it won’t get easier if there’s less of it. On the other hand, it’s easy to get tin-bismuth alloy from places like McMaster-Carr.

  6. JoeRowley says:

    There is a neat kit for 22 dollars (usd)I like it

  7. Rybec Arethdar says:

    Look for pyrolytic carbon. I looked for this several years ago, and I found some at a few chemistry/science supply sites.

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