Effects of Transverse Magnetic Anisotropy on Current-Induced Spin Switching

Article, Preprint English OPEN
Misiorny, Maciej ; Barnaś, Józef (2013)
  • Publisher: APS
  • Journal: (issn: 1079-7114 0031-9007)
  • Related identifiers: doi: 10.1103/PhysRevLett.111.046603
  • Subject: Condensed Matter - Mesoscale and Nanoscale Physics
    • ddc: ddc:550
    arxiv: Condensed Matter::Strongly Correlated Electrons | Condensed Matter::Materials Science

Spin-polarized transport through bistable magnetic adatoms or single-molecule magnets (SMMs), which exhibit both uniaxial and transverse magnetic anisotropy, is considered theoretically. The main focus is on the impact of transverse anisotropy on transport characteristics and the adatom's/SMM's spin. In particular, we analyze the role of quantum tunneling of magnetization (QTM) in the mechanism of the current-induced spin switching, and show that the QTM phenomenon becomes revealed as resonant peaks in the average values of the molecule's spin and in the charge current. These features appear at some resonant fields and are observable when at least one of the electrodes is ferromagnetic. We also show that the conductance generally depends on the relative orientation of the average adatom's/SMM's spin and electrode's magnetic moment. This spin-valve like magnetoresistance effect can be used to control spin switching of the adatom's/SMM's spin.
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    ported by National Science Center in Poland as a research project in years 2010-2013 and the Project No.

    DEC-2012/04/A/ST3/00372. misiorny@amu.edu.pl

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