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Magneto-optical properties of Fe/Cr/Fe/MgO/Fe structures epitaxially grown on GaAs(001)

Przybylski, M.; Grabowski, J.; Wulfhekel, W.; Rams, M.; Tomala, K.; Kirschner, J.


Fe/Cr/Fe trilayers were epitaxially grown on atomically flat GaAs(001). For the thickness of Cr spacer layer corresponding to antiferromagnetic coupling, "reversed" minor hysteresis loops were measured with longitudinal magneto-optical Kerr effect (MOKE), i.e., a negative "magnetization" signal was detected when the thicker bottom Fe layer was saturated along the applied field. This behavior is interpreted by depth variations of the MOKE sensitivity. Magnetization reversal shows that both antiferromagnetic switching and spin-flop transition fields depend on the ratio of both Fe film thicknesses. The shape of the MOKE loops becomes more complex with further deposition of MgO and Fe layers on the top of the Fe/Cr/F/GaAs(001) stack. Superconducting quantum interference device measurements confirm the interpretation of the MOKE loops and demonstrate homogeneity and sharpness of the interfaces in the structures. (C) 2004 American Institute of Physics.

DOI: 10.1063/1.1632016
Zitationen: 9
Web of Science
Zitationen: 8
Zitationen: 8
Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2004
Sprache Englisch
Identifikator ISSN: 0021-8979
KITopen-ID: 1000053848
Erschienen in Journal of Applied Physics
Verlag American Institute of Physics (AIP)
Band 95
Heft 2
Seiten 597-602
Nachgewiesen in Dimensions
Web of Science
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