Question: For a superconducting material at a temperature T below the critical temperature TC, the critical field HC (T), depends on temperature according to the relationship

For a superconducting material at a temperature T below the critical temperature TC, the critical field HC (T), depends on temperature according to the relationship

where HC(0) is the critical field at 0 K.
(a) Using the data in Table 20.7, calculate the critical magnetic fields for tin at 1.5 and 2.5 K..
(b) To what temperature must tin be cooled in a magnetic field of 20,000 A/m for it to be superconductive?

He(T)=Ho(0)11-1 (20.14) -

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