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TEM and HRTEM micrographs of Zn0.95Co0.05O [(a),(d)], Zn0.95Co0.05O + SiO2 [(b),(e)] and Zn0.95Co0.05O + CNTS [(c),(f)] polycrystalline samples. (g) Corresponding x-ray diffraction patterns.
Magnetization hysteresis loops of Zn0.95Co0.05O, SiO2 treated Zn0.95Co0.05O, and CNTS treated Zn0.95Co0.05O samples at 300 K.
Magnetization hysteresis loops of Zn0.95Co0.05O, Zn0.95Co0.05O +SiO2 and Zn0.95Co0.05O + CNTS polycrystalline samples after oxygen annealing. The inset is the Core-level XPS spectrum of Co 2p for CNTS treated Zn0.95Co0.05O sample after oxygen annealing.
(a)-(c) Normalized XPS O 1s scans of Zn0.95Co0.05O, Zn0.95Co0.05O +SiO2 and Zn0.95Co0.05O + CNTS polycrystalline samples after post oxygen annealing. (d) Corresponding O/(ZnCo) atomic ratios and magnetizations.
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