Investigation of the Fe19Ni81/Fe50Mn50 exchange bias system with varying Cu spacer layer for partial decoupling


Investigation of the Fe19Ni81/Fe50Mn50 exchange bias system with varying Cu spacer layer for partial decoupling

Liedke, M. O.; Nembach, H.; Fassbender, J.; Hillebrands, B.

In order to modify the exchange interaction in a Fe19Ni81/Fe50Mn50 exchange bias system a Cu interlayer of varying thickness and position with respect to the interface has been introduced. In one direction the position of the intervening Cu layer varies from the interface to the top surface of the Fe50Mn50 layer at a constant Cu thickness, and in the other direction the Cu thickness itself varies. The introduction of the Cu layer leads to a partial exchange decoupling. The samples were grown in a UHV MBE system and investigated by magneto-optic Kerr effect magnetometry. Two-dimensional maps are obtained, which provide global information about the influence of the partial decoupling of the antiferromagnet as a function of Cu thickness tCu and FeMn thickness tFeMn. In order to obtain more quantitative information several line scans along the horizontal and vertical axes were evaluated. The influence of the partial decoupling on the origins of exchange bias will be discussed.

Keywords: magnetism; exchange-bias; exchange coupling

  • Lecture (Conference)
    Frühjahrstagung der Deutschen Physikalischen Gesellschaft, 08.-12.03.2004, Regensburg, Deutschland

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Publ.-Id: 6392