Hi I'm doing a lab report on high temperature superconductors, more specifically yttrium-barium-copper-oxide. i read that you can determine the two critical magnetic fields from a graph of critical current against magnetic field strength by finding the tangent to the curve at the y-intercept and then looking at where this line crosses the x- axis. and then the second critical value was where the curve intercepted the x-axis. Could you please explain this to me as at present i really don't understand. many thanks. Jonny
Re: determing the critical magnetic fields for type II superconductor
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