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Diamagnetic levitation

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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. 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.

  2. 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.

  3. 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.

  4. 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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