Grain structure and magnetic clustering in SiO2 added CoNiPt granular films
- 15 April 1997
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 81 (8) , 3925-3927
- https://doi.org/10.1063/1.365074
Abstract
Grain structure and its relation to the magnetic properties in added CoNiPt granular films have been studied, with the content varied from 0 to 8 mol %. With more than 4 mol %, significant grain boundaries with a width of a few nm are formed by the segregated . The average grain size in the film plane decreases from 16 to 9 nm with the increased up to 8 mol %. The media noise significantly decreases with increasing and remanent magnetized domains observed by magnetic force microscopy (MFM) also become finer. With 8 mol % , MFM shows that weak magnetic clustering spreads over the grains, with a diameter of about 100 nm. This clustering indicates the collaborative behavior of the magnetization between grains is responsible both for the steep magnetization reversal as well as the slight increase in the media noise as the recording density is increased.
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