论文信息 - Effect of light on the magnetic properties of cobalt ferrite nanoparticles

Effect of light on the magnetic properties of cobalt ferrite nanoparticles

We report variations in the coercivity of CoFe/sub 2/O/sub 4/ nanoparticles as a function of particle size, temperature and light intensity. For 30 nm particles, this change in was 2300 Oe at 10 K, 120 Oe at 170 K, for a light intensity of under 2 milliwatts. The remanent magnetization was nearly unchanged by illumination. A simple model of optical absorption followed by electron transfer between Co/sup 2+/ and Fe/sup 3+/ ions is proposed.

S. Majetich | M. Sorescu | K. Pellerin | A. Giri | W. Pongsaksawad

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