Abstract
Co-ferrite thin films were prepared by sputtering and subsequent annealing. Magnetic properties were strongly dependent on annealing temperature, annealing duration and film thickness. A coercivity as high as 9.3kOe was achieved in the Co-ferrite film with a thickness of 50nm. A small film thickness can restrict the formation of large particles. The high coercivity was associated with a nano-structure and lattice strain.
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