Структурные и электронные свойства нового соединения SrOs-=SUB=-2-=/SUB=-O-=SUB=-6-=/SUB=--=SUP=-*-=/SUP=-

It was shown theoretically that a new material SrOs2O6 can exist; the crystal structure of SrOs2O6 is formed by the layers of OsO6 octahedra having common edges and forming a honeycomb type lattice. The structural and electronic properties of SrOs2O6 were investigated by the first-principal calculations. An antiferromagnetic structure was found to be energetically favorable for the studied compound.

Исследование структуры и магнитных свойств сплавов FeRh-=SUB=-1-x-=/SUB=-Ir-=SUB=-x-=/SUB=- (x=0.5-1) первопринципными методами

This work is devoted to studying the structure and magnetic properties of FeRhl-xIrx (x = 0.5, 0.625, 0.75, 0.875, 1) alloys using first-principle methods using the VASP software package. Two types of structure (CuAu and CsCl) were considered in the work. The equilibrium lattice parameters, total energies and magnetic moments, and also total and partial densities of states for Fe-Rh-Ir were obtained. It was shown that an antiferromagnetic structure with a spin configuration of the AFM-III type is energetically favorable for all the studied alloys.

Ferromagnetic excess moments and apparent exchange bias in FeF2 single crystals

The anisotropic antiferromagnet FeF2 has been extensively used as an antiferromagnetic layer to induce exchange bias effects in ferromagnetic/antiferromagnetic bilayers and heterostructures. In this work, an apparent exchange bias occurring in the low temperature hysteresis loops of FeF2 single crystals is investigated. A detailed investigation of the hysteresis and remnant magnetization indicates that the observation of an apparent exchange bias in FeF2 stems from an intrinsic excess moment associated with a distortion of the antiferromagnetic structure of piezomagnetic origin.

Large linear magnetoelectric effect and field-induced ferromagnetism and ferroelectricity in DyCrO4

All the magnetoelectric properties of scheelite-type DyCrO4 are characterized by temperature- and field-dependent magnetization, specific heat, permittivity, electric polarization, and neutron diffraction measurements. Upon application of a magnetic field within ±3 T, the nonpolar collinear antiferromagnetic structure leads to a large linear magnetoelectric effect with a considerable coupling coefficient. An applied electric field can induce the converse linear magnetoelectric effect, realizing magnetic field control of ferroelectricity and electric field control of magnetism. Furthermore, a higher magnetic field (>3 T) can cause a metamagnetic transition from the initially collinear antiferromagnetic structure to a canted structure, generating a large ferromagnetic magnetization up to 7.0 μB f.u.−1. Moreover, the new spin structure can break the space inversion symmetry, yielding ferroelectric polarization, which leads to coupling of ferromagnetism and ferroelectricity with a large ferromagnetic component.

Asymmetric current-driven switching of synthetic antiferromagnets with Pt insert layers

A perpendicularly magnetized synthetic antiferromagnetic structure is a promising alternative to a single ferromagnetic layer in spintronic applications because of its low net magnetization and high thermal stability.