Anisotropy and Penetration Depth of MgB${}_2$ from ${}^{11}$B NMR

Bo Chen, Pratim Sengupta, W. P. Halperin +7

The ${}^{11}$B NMR spectra in polycrystalline MgB${}_2$ were measured for several magnetic fields (1.97 T and 3.15 T) as a function of temperature from 5 K to 40 K. The composite spe…