Introduction
摘要
Superconductor is a characteristic material thathas no electrical resistivity. This property can be realized in application by introducingdefects called pinning centers in superconductors: These prevent quantizedmagnetic flux lines being driven by the Lorentz force due to the current, resulting innon-resistive current.Various aspects of flux pinning phenomena including the longitudinalmagnetic field effect, which are described in this book, are briefly introducedin this chapter.