Engineering Physics

9.3 Type-I and Type-II superconductors

Depending on the way of transition from superconducting state to normal state by the application of magnetic field, superconductors are divided into Type-I and Type-II superconductors. In case of Type-I superconductors, as we increase the intensity of applied magnetic field, inside the material opposing magnetization takes place up to some applied magnetic field, up to this applied magnetic field, the material is completely diamagnetic and it is in superconducting state. As the applied field reaches the critical value, H_C, all of a sudden the magnetic force lines pass through the material and the material changes sharply from superconducting state to normal state as shown in Fig. 9.8. This effect (Type-I ...