Abstract
The giant magnetoresistance (GMR) effect was an epoch-making discovery in the field of magnetic materials research. In this article, studies on magnetic multilayered systems relating to GMR are briefly surveyed and the role of interlayer coupling in GMR phenomena is argued. The usefulness of Mössbauer spectroscopy as a tool to investigate GMR systems is introduced. Although the GMR effect was observed for the first time in Fe/Cr multilayers, magnetic properties of ultrathin Cr layers were not well known until quite recently. Magnetic behaviors of multilayers including ultrathin Cr layers have been investigated from 119Sn Mössbauer spectroscopy and neutron diffraction. In Cr/Sn multilayers, it was found that the spin-density-wave structure of Cr layer is systematically modified by the insertion of monatomic Sn layers.
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Shinjo, T., Mibu, K. Magnetic Properties of Metallic Multilayered Systems. Hyperfine Interactions 144, 53–64 (2002). https://doi.org/10.1023/A:1025485101365
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DOI: https://doi.org/10.1023/A:1025485101365