title: Carrier-induced noncollinear magnetism in perovskite manganites by first-principles calculations.
abstract: We have performed noncollinear first-principles density-functional calculations of carrier-doped perovskite manganites La(1-x)Sr(x)MnO(3) (0.0≤x≤1.0). In the calculated magnetic phase diagram (T = 0) within the collinear magnetic configurations, ferromagnetic and several antiferromagnetic configurations successively appeared as a ground state with increasing x. The calculated total energies of the ferromagnetic and A-type antiferromagnetic phases are almost degenerate around the phase boundary, x = 0.5. We found that the noncollinear magnetic configurations are stable in a wide range of carrier concentrations 0.3≤x≤0.6. We discuss the effect of lattice distortions on the stability of the noncollinear magnetic phase.
authors.affiliation: Division of Mathematical and Physical Science, Graduate School of Natural Science and Technology, Kanazawa University, Kakuma, Kanazawa 920-1192, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Sawada
authors.forename: F
authors.initials: F
authors.lastname: Ishii