Giant magnetocrystalline anisotropies of 4d transition-metal monowires.
The magnetocrystalline anisotropy energy (MAE) for ferromagnetic and antiferromagnetic freestanding monowires of 4d transition metals is investigated on the basis of first-principles calculations. Across the 4d series, the easy axis of the magnetization oscillates between two directions: perpendicular and along the wire axis. The largest values of the MAE occur at the end of the series. Giant values of 30-60 meV/atom can be obtained upon stretching Ru or Rh wires. Ru and Pd chains change the magnetization direction upon wire stretching, opening new perspectives in controlling the spin-dependent ballistic conductance in these structures.
Mokrousov
Y
Y
Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany. ymokrous@physnet.uni-hamburg.de
Bihlmayer
G
G
Heinze
S
S
Blügel
S
S