MadSci Network: Physics

Subject: determing the critical magnetic fields for type II superconductor

Date: Wed Dec 28 08:26:36 2005
Posted by Jonathan Frazer
Grade level: undergrad School: imperial college
City: london State/Province: No state entered. Country: britain
Area of science: Physics
ID: 1135783596.Ph


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.


Re: determing the critical magnetic fields for type II superconductor

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