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 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.
- TSTNE-Probe-STM: Scanning Tunneling Microscope
- SMI-NE: From 2006 in EWI-NE
Banerjee, T., Ul Haq, E., Siekman, M. H., Lodder, J. C., & Jansen, R. (2005). Spin filtering of hot holes in a metallic ferromagnet. Physical review letters, 94(027204), 027204. https://doi.org/10.1103/PhysRevLett.94.027204