A magnetization and ${}^{11}$B NMR study of Mg${}_{1-x}$Al${}_x$B${}_2$ superconductors

M. Pissas, G. Papavassiliou, M. Karayanni +5

We demonstrate for the first time the magnetic field distribution of the pure vortex state in lightly doped Mg${}_{1-x}$Al${}_x$B${}_2$ ($x\le 0.025$) powder samples, by using ${}^{11}$B…