Effect of Distributed Particle Magnetic Moments on the Magnetization of   NiO Nanoparticles
  Magnetization of nanoparticles of NiO are measured and analyzed taking into account a distribution in particle magnetic moment. We find that disregarding this distribution in the analysis is the reason for the many anomalous observations reported on this system in the literature. 
S. D. Tiwari and K. P. Rajeev
cond-mat.mes-hall