Fig. 4From: Strong Pinned-Spin-Mediated Memory Effect in NiO Nanoparticles a Stretched-exponential and b power-law fit to the magnetization relaxation curve measured for 1 h from 14 nm NiO measured at 2, 30, 60, and 90 K in a 100-Oe field. The fitting parameters are depicted in the figureBack to article page