Origin of Magnetic Contrast in Spin-Polarized Scanning Tunneling Spectroscopy: Experiments on Ultra-Thin Mn Films
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概要
- 論文の詳細を見る
Normalized differential tunneling conductivities obtained with Fe-coated W tips show a spin-polarized peak around $+0.8$ V on ultrathin bct Mn films grown on Fe(001)-whiskers. This spin-polarized peak results in a clear magnetic contrast in spectroscopic images. Our normalization removes the influence of the tunneling probability and makes the spectroscopic curves most reliable for a derivation of the spin-resolved sample density of states (DOS) at positive voltages. From this analysis we conclude that the magnetic contrast in our spectroscopic maps is caused by a highly polarized DOS. Furthermore, a tip polarization of about 15% is found.
- 2003-07-15
著者
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Van Kempen
Nsrim University Of Nijmegen
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Mizoguchi Tadashi
Faculty Of Pharmaceutical Sciences Osaka University
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Van Kempen
NSRIM, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
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Yamada Toyo
NSRIM, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
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Bischoff Maarten
NSRIM, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
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Heijnen George
NSRIM, University of Nijmegen, NL-6525 ED Nijmegen, The Netherlands
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Mizoguchi Tadashi
Faculty of Science, Gakushuin University, Mejiro, Tokyo 171-8588, Japan
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