Time dependent magnetization in CoxFe3-xO4 nanocrystals Real-time investigation of the dynamic structural changes of metal oxide nanocrystals Dong Hee Son, Department of Chemistry, Texas A&M university College Station Texas 77842 Time dependent magnetization in CoxFe3-xO4 nanocrystals Correlation between spin-lattice relaxation rate and magnetic anisotropy energy Cobalt content Spin lattice relaxation rate correlates with the magnetic anisotropy energy of CoxFe3-xO4 nanocrystals that reflects the average spin-orbit coupling strength increasing with Co content (x) in the nanocrystal. With increasing Co content in CoxFe3-xO4 nanocrystals, spin-lattice relaxation rate increases.