Properties and Types of Superconductors

The disappearing of electrical resistance below the critical temperature (Tc) is known as superconductivity discovered by Kamerlingh Onnes in 1911. Superconductors are consisted two categories namely type I and II also called soft hard superconductors, respectively. Type superconductors obey Meissner effect while do not. superconducting compounds divided into three categories, (i) Metal based systems, (ii) Copper oxides (cuprates) (iii) Iron (IBSC). Metal-based combination cubic crystal configuration named A15 structure. Initial IBSC was revealed 2006 for LaFePO; nevertheless, Tc stayed small ~4 K. High-Tc were then expressed LaFeAsO1–xFx means = 26 K 2008. have considerable positions lower magnet applications such MRI, nuclear magnetic resonance quantum interference.