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Título:
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Exchange bias and two steps magnetization reversal in porous Co/CoO layer
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Autores:
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Ovejero, Jesús G. ;
Godinho, Vanda ;
Lacroix, Bertrand ;
García, Miguel A. ;
Hernando Grande, Antonio ;
Fernández, Asunción
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Tipo de documento:
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texto impreso
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Editorial:
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Elsevier Science, 2019-06-05
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Dimensiones:
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application/pdf
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Nota general:
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cc_by_nc_nd
info:eu-repo/semantics/openAccess
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Idiomas:
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Palabras clave:
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Estado = Publicado
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Materia = Ciencias: Física: Física de materiales
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Materia = Ciencias: Física: Física del estado sólido
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Tipo = Artículo
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Resumen:
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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.
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En línea:
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https://eprints.ucm.es/id/eprint/55370/1/HernandoGrande%20113%20libre%2BCC%28nc_nd%29.pdf
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