Zn0.9Co0.1O/ MCM-41 Composite: Synthesis and Magnetism
Cobalt doped zinc oxide diluted magnetic semiconductors (DMSs) were assembled in MCM-41 template by sol-gel method. Samples were characterized by X-ray diffraction (XRD), transmission electron microscope (TEM), physisorption, as well as the magnetism measurement. It was found that the wurtzite symmetry of the MCM-41 pores was not changed while the pore diameter became smaller after the DMSs deposited into the pores. The Zn0.9Co0.1O-MCM-41 presents a superparamagnetic behavior between 80K and 300K, while Zn0.9TM0.1O-MCM-41 (TM=Mn, Fe, Ni) samples are paramagnetic at the same temperature range.
W. B. Liu et al., "Zn0.9Co0.1O/ MCM-41 Composite: Synthesis and Magnetism", Advanced Materials Research, Vol. 266, pp. 80-83, 2011