title: Giant magnetocrystalline anisotropies of 4d transition-metal monowires.
abstract: 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.
authors.affiliation: Institut für Festkörperforschung, Forschungszentrum Jülich, D-52425 Jülich, Germany. ymokrous@physnet.uni-hamburg.de
authors.forename: Y
authors.initials: Y
authors.lastname: Mokrousov
authors.forename: G
authors.initials: G
authors.lastname: Bihlmayer
authors.forename: S
authors.initials: S
authors.lastname: Heinze
authors.forename: S
authors.initials: S
authors.lastname: Blügel