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期刊论文
Effects of Fe3O4 underlayer on the annealing temperature of CoFe2O4 thin films
Phys. Status Solidi A, 206 3(2009)547-549，-0001，（）：
CoFe2O4 films of 100 nm thickness were deposited on 20 nm, rf magnetron-sputtered Fe3O4 underlayers on naturally oxidized Si (100) substrates. These films were then annealed, and the magnetic properties and microstructures were investigated as a function of annealing temperature. Results show that the optimum annealing temperature to obtain the maximum coercivity decreases from 700℃ for films without Fe3O4 underlayers to 500℃ for films with underlayers. The decreased annealing temperature corresponds to a phase transformation of the Fe3O4 underlayers at about 400-500℃, which accelerates the increase in grain size of the cobalt ferrite films.
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