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Sökning: WFRF:(Misiorny M.)

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1.
  • Misiorny, M., et al. (författare)
  • Probing transverse magnetic anisotropy by electronic transport through a single-molecule magnet
  • 2015
  • Ingår i: Physical Review B (Condensed Matter and Materials Physics). - 1098-0121. ; 91:3
  • Tidskriftsartikel (refereegranskat)abstract
    • By means of electronic transport, we study the transverse magnetic anisotropy of an individual Fe-4 single-molecule magnet (SMM) embedded in a three-terminal junction. In particular, we determine in situ the transverse anisotropy of the molecule from the pronounced intensity modulations of the linear conductance, which are observed as a function of applied magnetic field. The proposed technique works at temperatures exceeding the energy scale of the tunnel splittings of the SMM. We deduce that the transverse anisotropy for a single Fe-4 molecule captured in a junction is substantially larger than the bulk value.
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2.
  • Morgan, Caitlin, et al. (författare)
  • Impact of tunnel-barrier strength on magnetoresistance in carbon nanotubes
  • 2016
  • Ingår i: Physical Review Applied. - 2331-7019. ; 5:5, s. 054010-
  • Tidskriftsartikel (refereegranskat)abstract
    • We investigate magnetoresistance in spin valves involving CoPd-contacted carbon nanotubes. Both the temperature and bias-voltage dependence clearly indicate tunneling magnetoresistance as the origin. We show that this effect is significantly affected by the tunnel-barrier strength, which appears to be one reason for the variation between devices previously detected in similar structures. Modeling the data by means of the scattering matrix approach, we find a nontrivial dependence of the magnetoresistance on the barrier strength. Furthermore, an analysis of the spin precession observed in a nonlocal Hanle measurement yields a spin lifetime of tau_s=1.1  ns, a value comparable with those found in silicon- or graphene-based spin-valve devices.
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