Improving the Magnetic Properties of Co鈥揅oO Systems by Designed Oxygen Implantation Profiles
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- 作者：Enric Men茅ndez ; Joost Demeter ; Jelle Van Eyken ; Przemyslaw Nawrocki ; Ewa Jedryka ; Marek W贸jcik ; Jos茅 Francisco Lopez-Barbera ; Josep Nogu茅s ; Andr茅 Vantomme ; Kristiaan Temst
- 刊名：ACS Applied Materials & Interfaces
- 出版年：2013
- 出版时间：May 22, 2013
- 年：2013
- 卷：5
- 期：10
- 页码：4320-4327
- 全文大小：517K
- 年卷期：v.5,no.10(May 22, 2013)
- ISSN：1944-8252
文摘
Oxygen implantation in ferromagnetic Co thin films is shown to be an advantageous route to improving the magnetic properties of Co鈥揅oO systems by forming multiple nanoscaled ferromagnetic/antiferromagnetic interfaces homogeneously distributed throughout the layer. By properly designing the implantation conditions (energy and fluence) and the structure of the films (capping, buffer, and Co layer thickness), relatively uniform O profiles across the Co layer can be achieved using a single-energy ion implantation approach. This optimized configuration results in enhanced exchange bias loop shifts, improved loop homogeneity, increased blocking temperature, reduced relative training effects and increased retained remanence in the trained state with respect to both Co/CoO bilayers and O-implanted Co films with a Gaussian-like O depth profile. This underlines the great potential of ion implantation to tailor the magnetic properties by controllably modifying the local microstructure through tailored implantation profiles.