First year project: Syntese og undersøgelse af type II superledere

Superconductor levitating

Superconductor levitating

My first year project was conducted in collaboration with Esben Tore Mølgaard and Sonja Holm. We manufactured three different high-temperature superconductors and investigated their lattice structure, susceptibility, resistivity, and critical current. Also, we carried out the same experiments on a YBCO sample with reduced oxygen level.

You can download the project here and the appendices here.

The project is in danish

  1. Spencer H says:

    Well done! I attempted to read and translate the project, rather unsuccessfully. But that’s ok. So I wonder- could these ceramics be manufactured from materials available to the average consumer? I’ve seen the ceramics online, but I’d rather make them myself.
    Also, this next question is perhaps more important to me: When Bednorz and Muller were first experimenting with high-temperature superconductors, how did they come up with the idea to use transition metal oxides? Was it by mere accident?

    – Spencer

    • Jeppe Juul says:

      Dear Spencer,

      I am glad that you find the project interesting. As you have probably noticed, the project was carried out as a part of my physics degree at University of Copenhagen in my first year. It is impressive that you have been able to get anything out of it, since it is in danish.

      We ordered all the compounds through University of Copenhagen. I think it should be possible to order the same compounds as a private person, but it will probably be expensive. Furthermore, you will need an oven that can go to very high temperatures for a long time, so that might also be a problem for you. Even then, the quality will probably not be as good as if you just buy a BISCO or YBCO superconductor.

      Honestly, I don’t know what led Bednorz and Müller to investigate copper-oxides. I actually think that it was purely coincidental, and that the super-conducting properties came as a surprise for them. Not a bad way to get a Nobel Prize 🙂

      Kind regards,