Preparation of high moment CoFe films with controlled grain size and coercivity
- Department of Physics, University of York, York, YO10 5DD (United Kingdom)
In this paper a preparation method for high moment CoFe thin films with soft magnetic properties is reported. A full control of coercivity in a series of 20-nm-thick CoFe films has been achieved without using seed layers, additives, or thermal annealing. The films were sputtered directly onto Si substrates and the coercivity was varied by changing the mean grain size in the sputtered films. The mean grain size was in turn controlled via the sputtering rate. A reduction in the coercivity has been observed from 120 Oe for samples with a mean grain size larger than 17 nm down to 12 Oe for a sample with a mean grain size of 7.2 nm. The results are in good agreement with the 'random anisotropy model' relating the coercivity to the mean grain size in polycrystalline ferromagnetic films.
- OSTI ID:
- 20711681
- Journal Information:
- Journal of Applied Physics, Vol. 97, Issue 10; Conference: 49. annual conference on magnetism and magnetic materials, Jacksonville, FL (United States), 7-11 Nov 2004; Other Information: DOI: 10.1063/1.1855276; (c) 2005 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0021-8979
- Country of Publication:
- United States
- Language:
- English
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