Spin-filtering of hot holes in a metallic ferromagnet

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Banerjee, T. and Ul Haq, E. and Siekman, M.H. and Lodder, J.C. and Jansen, R. (2005) Spin-filtering of hot holes in a metallic ferromagnet. Physical Review Letters, 94 (2). 027204. ISSN 0031-9007

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Abstract:Spin-dependent transport of nonequilibrium holes in ferromagnetic thin films and trilayers is investigated using ballistic hole magnetic microscopy. For Co, the hole attenuation length is short and increases from 6 to 10 Å in the energy range 0.8 to 2 eV. The hole transmission of a Ni81Fe19/Au/Co trilayer is clearly spin dependent, resulting in a surprisingly large current change by a factor of 2.3 in a magnetic field. The energy and spin dependence of the hole transmission cannot be explained by the phase space available for inelastic decay of the hot holes.
Item Type:Article
Copyright:© 2005 The American Physical Society
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Link to this item:http://purl.utwente.nl/publications/48084
Official URL:http://dx.doi.org/10.1103/PhysRevLett.94.027204
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Metis ID: 219248