Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1595105 | Solid State Communications | 2009 | 4 Pages |
Abstract
Dense nanodonut and nanotip type morphologies are shown to self-evolve in ultrathin cobalt films during growth under vacuum, depending on the level of oxygen incorporation and temperature. The nanodonut morphology forms at room temperature and the corresponding magnetic hysteresis shows exchange bias (∼35 Oe shift along the field axis), which is attributed to the presence of CoO and its exchange coupling with cobalt. The morphology evolves into nanotip features with increase of growth temperature, with concurrent elimination of the oxide component and exchange bias.
Related Topics
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Materials Science
Materials Science (General)
Authors
Deodatta Phase, Ram Janay Choudhary, V. Ganesan, V. Raghvendra Reddy, Ajay Gupta, N. Selvi, Sneha Kulkarni, Satishchandra Ogale,