Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

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概要

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• The magnetic properties of bulk Cr tips have been investigated by spin-polarized scanning tunneling spectroscopy (SP-STS). To extract the properties of the Cr tips, we performed low-temperature SP-STS measurements on a well-known model system: nanometric Co islands on Cu(111). Our experiments indicate the existence of uncompensated magnetic moments at the apex of the Cr tips, which rotate in the direction of the applied vertical magnetic field and become aligned with it at approximately 2 T. We extracted a tip spin polarization of 45% at the Fermi energy. We showed that the tip spin polarization can change with a modification of the tip apex.

• 2012-03-25

著者

• Sander Dirk

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Corbetta Marco

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Ouazi Safia

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Borme Jerome

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Nahas Yasmine

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Donati Fabio

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Oka Hirofumi

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Wedekind Sebastian

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

• Kirschner Jürgen

  Max Planck Institute of Microstructure Physics, Weinberg 2, 06120 Halle, Germany

関連論文

• Magnetic Response and Spin Polarization of Bulk Cr Tips for In-Field Spin-Polarized Scanning Tunneling Microscopy

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