Magnetic and structural properties of the Fe layers in CoO/Fe/Ag(001) Heterostructure

Rantej Bali (1) , Marcio Soares (2) , Aline Y. Ramos (3) , Hélio Tolentino (4) , Fikret Yildiz (1) , Clémence Boudot (2) , Olivier Proux (5) , Maurizio de Santis (2) , Marek Przybylski (1) , Jürgen Kirschner (1)

1 MPI-HALLE - Max-Planck-Institut für Mikrostrukturphysik
2 NEEL - SIN - Surfaces, Interfaces et Nanostructures
3 NEEL - MRS - Matériaux, Rayonnements, Structure
4 NEEL - CRG - CRG & Grands instruments
5 OSUG - Observatoire des Sciences de l'Univers de Grenoble

The influence of interfacial oxidation on the magnetic behaviour of CoO covered Fe/Ag(001) is reported. Coverage with CoO causes the formation of a mixed Fe2O3-Fe3O4 interfacial oxide layer. The depth of the Fe-oxide varies with the thickness of pre-covered Fe and above 8 monolayers (MLs) of Fe the oxide depth becomes constant at 2 ML. Differences in exchange bias and coercivity obtained from magnetic field and zero field cooling nearly vanish above 8ML Fe thickness, showing a direct correlation between the magnetic behaviour of Fe and structure of the interfacial Fe-oxide layer

Mots clés: exchange bias; MOKE; thin magnetic films; XANES

Domaines: Science des matériaux [cond-mat.mtrl-sci]

Rantej Bali, Marcio Soares, Aline Y. Ramos, Hélio Tolentino, Fikret Yildiz, et al.. Magnetic and structural properties of the Fe layers in CoO/Fe/Ag(001) Heterostructure. Applied Physics Letters, 2012, 100 (13), pp.132403. ⟨10.1063/1.3695158⟩. ⟨hal-00682934⟩