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American Physical Society, Physical Review Letters, 2(94), 2005

DOI: 10.1103/physrevlett.94.027204

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Spin Filtering of Hot Holes in a Metallic Ferromagnet

Journal article published in 2005 by T. Banerjee ORCID, E. Haq, M. H. Siekman, J. C. Lodder, R. Jansen
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This paper is available in a repository.

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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 A in the energy range 0.8 to 2 eV. The hole transmission of a Ni(81)Fe(19)/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.