Excitation and spin-transport of hot holes in ballistic hole magnetic microscopy

Haq, E. and Banerjee, T. and Siekman, M.H. and Lodder, J.C. and Jansen, R. (2006) Excitation and spin-transport of hot holes in ballistic hole magnetic microscopy. Applied physics letters, 88 . p. 242501. ISSN 0003-6951

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Abstract:	A hybrid structure of a ferromagnetic Co/Au/Ni81Fe19 trilayer on p-type silicon is used to probe the excitation of electron-hole pairs in a ferromagnet during inelastic decay of hot electrons and the subsequent spin-dependent transport of the excited holes into the valence band of the p-type Si collector. The hole current is remarkably sensitive to magnetic fields, with a magnetocurrent of up to 250% and, unexpectedly, with a positive sign. We determine effective attenuation lengths and their magnetic field and bias voltage dependence.
Item Type:	Article
Copyright:	© 2006 American Institute of Physics
Faculty:	Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:	Nano-Electronics (NE)
Link to this item:	http://purl.utwente.nl/publications/66921
Official URL:	http://dx.doi.org/10.1063/1.2212066
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Metis ID: 237955