Journal
APPLIED PHYSICS LETTERS
Volume 84, Issue 14, Pages 2596-2598Publisher
AMER INST PHYSICS
DOI: 10.1063/1.1695438
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Co-ferrite films were deposited on SiO2 single-crystal substrates. The as-deposited films were amorphous. The crystallization required an annealing at 700 degreesC or higher. Magnetic properties were found to be strongly dependent on annealing temperature, annealing duration, and film thickness. A small film thickness can restrict the formation of large particles. A coercivity as high as 9.3 kOe was achieved in the 50 nm film after annealing at 900 degreesC for 15 min deposited on (100)-SiO2 substrate. The high coercivity was associated with a nanostructure, lattice strain, and larger Raman shift with a relatively sharp peak. (C) 2004 American Institute of Physics.
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