engleski

Enhancement of flux pinning in neutron irradiated MgB_2 superconductor

m-H loops for virgin and neutron irradiated bulk and powder samples of MgB_2 were measured in the temperature range 5-30 K in magnetic field B<1T. The irradiation oat thermal neutron fluences 9x10^13 and 4.5x10^14 cm^-2 caused very small enhancement of m-H loops at lower temperatures (T<20K), whereas the effect at high temperatures was nuclear due to the difficulty in achieving exactly the same measurement temperature prior and after irradiation.

virgin and neutron irradiated MgB_2 ; bulk and powder samples ; Field B<1 T ; temperature 5-30 K clear enhancement of m-H loops at 4.5x10^15 cm^-2 ; flux pinning

nije evidentirano