Photoemission study of the Fe(001)∕MgO interface for varying oxidation conditions of magnesium oxide

Photoemission study of the Fe(001)∕MgO interface for varying oxidation conditions of magnesium oxide

The nature of interface bonding essentially determines the spin polarization of tunneling currents through ferromagnet/insulator interfaces. We focus on the influence of ultrathin off-stoichiometric MgO coverages on the spin-polarized electronic structure of the (001) surface of bcc-Fe. By applying...

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Veröffentlicht in:Journal of applied physics 2007-05, Vol.101 (9)
Hauptverfasser: Müller, Martina, Matthes, Frank, Schneider, Claus M.
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Matthes, Frank
Schneider, Claus M.
description The nature of interface bonding essentially determines the spin polarization of tunneling currents through ferromagnet/insulator interfaces. We focus on the influence of ultrathin off-stoichiometric MgO coverages on the spin-polarized electronic structure of the (001) surface of bcc-Fe. By applying a combination of low-energy spin-resolved and core-level photoelectron spectroscopy, we show that the MgO stoichiometry has a direct impact on the interfacial spin polarization. The results underline the importance of controlling the chemical composition and bonding at ferromagnet/oxide interfaces to further optimize spin-dependent tunneling devices.
doi_str_mv 10.1063/1.2711418
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title Photoemission study of the Fe(001)∕MgO interface for varying oxidation conditions of magnesium oxide
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