Kohji Nakamura

Canted ferromagnetism in RuSr 2 GdCu 2 O 8

First principles calculations using the full-potential linearized augmented plane wave method including intra-atomic noncollinear magnetism have been performed to determine the magnetic structures of

Magnetic and electronic structures of superconducting RuSr2GdCu2O8

{mathrm{RuSr}}_{2}{mathrm{GdCu}}_{2}{mathrm{O}}_{8}.

Jahn-Teller driven perpendicular magnetocrystalline anisotropy in metastable ruthenium

The magnetism clearly arises from the

Reconstructions on AlN Polar Surfaces under Hydrogen Rich Conditions

{mathrm{RuO}}_{6}

Reduced-dimensionality-induced helimagnetism in iron nanoislands

octahedra where the moments on neighboring Ru sites order antiferromagnetically but cant perpendicular to the antiferromagnetic (AFM) axischar22{}and so induce a weak ferromagnetism. The projected Ru moments along the AFM and FM axes result in magnetic moments of 1.16 and

Magnetism and magnetic anisotropy in FM NiFe, AFM NiMn and their interface

0.99{ensuremath{mu}}_{B},

Spin-spiral structures in free-standing Fe(110) monolayers

respectively. The results are consistent with the possible coexistence of canted ferromagnetism and superconductivity in the

Electric Field-Induced Modification of Magnetocrystalline Anisotropy in Transition-metal Films and at Metal-Insulator Interfaces

{mathrm{RuSr}}_{2}{mathrm{GdCu}}_{2}{mathrm{O}}_{8}

Interfacial Dzyaloshinskii-Moriya interaction and orbital magnetic moments of metallic multilayer films

char22{}inferred from experiments.

Noncollinear magnetism and exchange interaction in spin-spiral structures of thin film Fe(110)

The coexistence of ferromagnetism and superconductivity in RuSr{sub 2}GdCu{sub 2}O{sub 8} was reported both from experiments (by Tallon et al.) and first-principles calculations (by Pickett et al.). Here we report that our first-principles full-potential linearized augmented plane wave calculations, employing the precise crystal structure with structural distortions (i.e., RuO{sub 6} rotations) determined by neutron diffraction, demonstrate that antiferromagnetic ordering of the Ru moments is energetically favored over the previously proposed ferromagnetic ordering. Our results are consistent with recently performed magnetic neutron diffraction experiments (Lynn et al.). Ru t{sub 2g} states, which are responsible for the magnetism, have only a very small interaction with Cu e{sub g} states, which results in a small exchange splitting of these states. The Fermi surface, characterized by strongly hybridized dp{sigma} orbitals, has nesting features similar to those in the two-dimensional high-T{sub c} cuprate superconductors.