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Find the critical temperature of a bismuth based ceramic

  1. Aug 1, 2010 #1
    Hello to all

    I recently completed an experiment trying to find the critical temperature of a bismuth based ceramic material. I cooled the sample using liquid nitrogen. I have attached my results in an excel file, where I had to plot the sample voltage (Vs) against thermocouple voltage(Vt). My question is, how do you measure the critical temperature from the graph. I was thinking it is the point where the graph gets rather steep. Any help would be appreciated.

    Thanks

    ps: the scale is mV
     

    Attached Files:

    Last edited: Aug 1, 2010
  2. jcsd
  3. Aug 2, 2010 #2
    Re: Superconductor

    Hi
    I think you shouid study some information about linear response theory & thermodynamics.
     
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