MEISSNER EFFECT

• When the superconducting material is placed in a magnetic field under the condition when T≤T_C and H ≤ H_C , the flux lines are excluded from the material.

• Material exhibits perfect diamagnetism or flux exclusion.

• Deciding property • χ = I/H = -1

• Reversible (flux lines penetrate when T ↑ from T _C )

• Conditions for a material to be a superconductor

i. Resistivity ρ = 0

ii. Magnetic Induction B = 0 when in an uniform magnetic field

• Simultaneous existence of conditions