Abstract
We have investigated hole-carrier-doping effects in a ferromagnetic insulator La2 MnNiO6. Employing the ab initio band-structure method, we have examined the changes in the electronic structures and the valence states of Sr-doped La2-x Srx MnNiO 6 with varying Sr doping ratio. On Sr doping, we have found a transition from a ferromagnetic insulating phase to a half-metallic phase. The half-metallic nature in La2-x Srx MnNiO6 is found to be robust with respect to the on-site Coulomb correlation of transition metal 3d electrons and the antisite disorder at B sites. We have corroborated that the substantially weak x-ray magnetic circular dichroism signal observed for La2-x Srx MnNiO6, as compared to the undoped system, is caused by antisite disorder at B sites in a Sr-doped system.
Original language | English |
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Article number | 224402 |
Journal | Physical Review B - Condensed Matter and Materials Physics |
Volume | 81 |
Issue number | 22 |
DOIs | |
State | Published - 1 Jun 2010 |