Sergey A. Ivanov

TL;DR: In this paper, the deformation electron-density maps and the anharmonicity of atomic displacements in strontium titanate, SrTiO 3 (Gram-Charlier model), were studied by high-precision single-crystal X-ray diffraction analysis at 145(1) and 296(2) K.

TL;DR: In this article, a straightforward unit cell of symmetry R 3m was obtained for the 300 K structure, with the same symmetry and a similar unit cell also obtained at low temperature, in order to assign non-zero magnetic moments to the iron ions, these being in a collinear, antiferromagnetic alignment This magnetic structure can be described with reference to doubled unit cell axes.

TL;DR: The creation of the materials with desirable as well as locally-regulated optical properties, which can be easily and reversibly changed under an action of external electro-magnetic fields, is presently one of the important problems of the physics and chemistry of solids both from the theoretical and applied points of view as mentioned in this paper.

TL;DR: In this paper, the structural properties of complex perovskite lead iron tungstate, Pb(Fe 2/3 W 1/3 )O 3 (PFW) which belongs to a class off disordered magnetoelectrics has been studied by neutron powder diffraction.

TL;DR: In this paper, a study of the double perovskites Ba2MnMoO6 and Sr2mmoO6 in polycrystalline form has been carried out by means of neutron powder diffraction (NPD) and magnetization measurements.