Longitudinal spin-relaxation in nitrogen-vacancy centers in electron irradiated diamond

摘要

We present systematic measurements of longitudinal relaxation rates (1/T_1) of spin polarization in the ground state of the nitrogen-vacancy (NV) color center in synthetic diamond as a function of NV~- concentration and magnetic field B. NV~- centers were created by irradiating a Type 1b single-crystal diamond along the [100] axis with 200 keV electrons from a transmission electron microscope with varying doses to achieve spots of different NV~- center concentrations. Values of (1/T_1) were measured for each soot as a function of B.