Observation of Pinning Strengthening in 'MgB_2 – CNT – α-Fe' Nanocomposites Studied by Microwave Absorption Technique

摘要

Microwave absorption histeresis is measured in superconducting composites, prepared from MgB_2, carbon nanotubes, graphene particles and iron nanoparticles. Iron nanoparticles were synthesized using of isopropanol in the supercritical fluid state. Measurements showed that the greatest increase in the pinning force is observed in the "MgB_2 – (CNT-α-Fe)" composite.