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Atomically Resolved Spin-Dependent Tunnelling on the Oxygen-Terminated Fe3O4 (111)

Authors
  • Berdunov, N.
  • Murphy, S.
  • Mariotto, G.
  • Shvets, I. V.
Type
Published Article
Publication Date
Jul 16, 2004
Submission Date
Mar 15, 2004
Identifiers
DOI: 10.1103/PhysRevLett.93.057201
arXiv ID: cond-mat/0403363
Source
arXiv
License
Unknown
External links

Abstract

We employ spin-polarized (SP) STM to study the spin-dependent tunneling between a magnetite (111) sample and an antiferromagnetic tip through a vacuum barrier at room temperature. Atomic scale STM images show significant magnetic contrast corresponding to variations in the local surface states induced by oxygen vacancies. The estimated variations in tunneling magnetoresistance (TMR) of 250% suggest that the spin-transport properties are significantly altered locally by the presence of surface defects.

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