Interface engineering towards enhanced exchange interaction between Fe and FeO in Fe/MgO/FeO epitaxial heterostructures

Interface engineering towards enhanced exchange interaction between Fe and FeO in Fe/MgO/FeO epitaxial heterostructures

In our study, we examined the chemical and magnetic properties of FeO in an epitaxial Fe/MgO(dMgO)/FeO trilayer for different MgO thicknesses, dMgO. Analysis of the chemical structure revealed a stoichiometry improvement in the FeO layer in Fe/MgO/FeO in comparison with a Fe/FeO bilayer. Furthermore...

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Veröffentlicht in:Applied physics letters 2019-09, Vol.115 (14)
Hauptverfasser: Kozioł-Rachwał, A., Janus, W., Szpytma, M., Dróżdż, P., Ślęzak, M., Matlak, K., Gajewska, M., Ślęzak, T., Korecki, J.
Format: Artikel
Sprache:eng
Schlagworte:
Applied physics
Exchanging
Heterostructures
Magnesium oxide
Magnetic properties
Magnetism
Organic chemistry
Stoichiometry
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Zusammenfassung:In our study, we examined the chemical and magnetic properties of FeO in an epitaxial Fe/MgO(dMgO)/FeO trilayer for different MgO thicknesses, dMgO. Analysis of the chemical structure revealed a stoichiometry improvement in the FeO layer in Fe/MgO/FeO in comparison with a Fe/FeO bilayer. Furthermore, we showed that deposition of a subtle MgO layer at the Fe/FeO interface results in an enhanced exchange interaction between Fe and FeO. For dMgO = 1.4 Å, we noted a 200% enhancement in the exchange bias in Fe/MgO/FeO compared to that in Fe/FeO.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.5112093