Magnetization of Zn1-xCoxO nanoparticles: single-ion anisotropy and spin clustering

X. Gratens, B. de Abreu Silva, M. I. B. Bernardi +3

The magnetization of Zn1-xCoxO (0.0055 < x < 0.073) nanoparticles has been measured as a function of temperature T (1.7 K < T , 10 K) and for magnetic field up to 65 kOe using a SQ…