Magnetic and transport properties of HTS MgB2 wires

2nd Conference on Plasma & Laser Research and Technologies

Abin, D.A.^1,2 ; Mineev, N.A.^1,2 ; Osipov, M.A.^1,2 ; Pokrovskiy, S.V.^1,2 ; Rudnev, I.A.^1,2

National Research Nuclear University MEPhI, Moscow Engineering Physics Institute, Kashirskoe sh. 31, Moscow

115409, Russia^1

International Laboratory of High Magnetic Fields and Low Temperatures, Gajowicka 95, Wroclaw

53-421, Poland^2

关键词: Diamagnetic contributions;    Ferromagnetic contribution;    Ferromagnetic response;    Magnetic and transport properties;    Magnetization curves;    Magnetization loops;    Superconducting phase;    Vibrating sample magnetometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/747/1/012023/pdf
DOI  :  10.1088/1742-6596/747/1/012023

来源: IOP

【 摘 要 】

Critical current Icand magnetization M of industrial MgB2tape and wire were measured in order to estimate their suitability for production of liquid helium free cryomagnetic system. Samples were subjected to bending with different diameters Dband critical current was measured at temperature T = 4.2 K in magnetic fields up to 10 T. The dependences of the critical current on the diameter of the bend Ic(Db) were found and used for optimization of liquid helium free cryomagnetic system. The magnetization of the wire was measured by a vibrating sample magnetometer at temperatures T = 4.2,10, 15, 20, 25 K in magnetic fields up to 14 T. It was found that the magnetization curve M (H) is influenced by ferromagnetic response of the metal matrix. Ferromagnetic contribution had been taken into account and magnetization loops caused by the diamagnetic contribution of the superconducting phase were extracted. Dependencies Ic(T)and Ic(H)were obtained from the data.