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Ovejero, Jesús G. and Godinho, Vanda and Lacroix, Bertrand and García, Miguel A. and Hernando Grande, Antonio and Fernández, Asunción (2019) Exchange bias and two steps magnetization reversal in porous Co/CoO layer. Materials and design, 171 . ISSN 0264-1275
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Official URL: http://dx.doi.org/10.1016/j.matdes.2019.107691
Abstract
In this paper Co/CoO thick layers (hundreds of nanometers) of different porosity and oxidation degree were prepared in a magnetron sputtering deposition process by tailoring the DC sputtering power, as well as the process gas and target composition. The control of the synthesis parameters allowed the nanostructuration of the films with a singular distribution of closed pores and a controlled amount of CoO. We observed an exchange bias field of 2.8 KOe for porous Co/CoO composites, similar to Co/CoO bilayers but for coatings thicker than 300 nm. Besides, it was observed that the coating presents bistable magnetic features when cooled under zero field conditions as a result of the unusual exchange coupling.
| Item Type: | Article |
|---|---|
| Additional Information: | ©2019 Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license |
| Uncontrolled Keywords: | Length scales; Thin-films; Nanoparticles; Anisotropy; Antidot; Co; Porous; Double loop; Exchange bias |
| Subjects: | Sciences > Physics > Materials Sciences > Physics > Solid state physics |
| ID Code: | 55370 |
| Deposited On: | 27 May 2019 18:54 |
| Last Modified: | 28 May 2019 09:01 |
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