Magnetic response and spin polarization of bulk Cr tips for in-field spin-polarized scanning tunneling microscopy

Marco Corbetta, Safia Ouazi, Jérôme Borme, Yasmine Nahas, Fabio Donati, Hirofumi Oka, Sebastian Wedekind, Dirk Sander, Jürgen Kirschner

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number030208
JournalJapanese journal of applied physics
Volume51
Issue number3 PART 1
DOIs
Publication statusPublished - 2012 Mar 1
Externally publishedYes

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)

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