%0 Journal Article
%T Magnetic properties of defect-free and oxygen-deficient cubic SrCoO$_{3-¦Ä}$
%A Martin Hoffmann
%A Vladislav S. Borisov
%A Sergey Ostanin
%A Ingrid Mertig
%A Wolfram Hergert
%A Arthur Ernst
%J Physics
%D 2015
%I arXiv
%R 10.1103/PhysRevB.92.094427
%X We investigated theoretically electronic and magnetic properties of the perovskite material SrCoO$_{3-\delta}$ with $\delta\leq 0.15$ using a projector-augmented plane-wave method and a Green's function method. This material is known from various experiments to be ferromagnetic with a Curie temperature of 260$\,$K to 305$\,$K and a magnetic moment of 1.5${\,\mu_\text{B}}$ to 3.0${\,\mu_\text{B}}$. Applying the magnetic force theorem as it is formulated within Green's function method, we calculated for SrCoO$_{3-\delta}$ the magnetic exchange parameters and estimated the Curie temperature. Including correlation effects by an effective $U$ parameter within the GGA$+U$ approach and verifying this by hybrid functional calculations, we obtained the Curie temperatures in dependence of the oxygen deficiency close to the experimental values.
%U http://arxiv.org/abs/1503.08009v2