The coupling between spins and electric dipoles governs magnetoelectric phenomena in
multiferroics. The dynamical magnetoelectric effect, which is an inherent attribute of the spin …

We review the recent progress on the magnetic skyrmions in chiral magnetic materials. The
magnetic skyrmion is a topological spin configuration with localized spatial extent, which …

We have investigated the magnetoelectric properties originating from the spin-dependent
hybridization between transition metal (X) d orbital and ligand ion p orbitals in the …

The recent discovery of a Skyrmion crystal phase in an insulating multiferroic compound Cu
2 OSeO 3 calls for new ways and ideas to manipulate the Skyrmions in the absence of spin …

We studied spin excitations in the magnetically ordered phase of the noncentrosymmetric Ba
2 CoGe 2 O 7 in high magnetic fields up to 33 T. In the electron spin resonance and far …

We demonstrate the existence of the spin-nematic interactions in an easy-plane type
antiferromagnet Ba 2 CoGe 2 O 7 by exploring the magnetic anisotropy and spin dynamics …

The ultimate goal of multiferroic research is the development of a new-generation
nonvolatile memory devices, where magnetic bits are controlled via electric fields with low …

Spin-dependent electric dipole operators are investigated group-theoretically for the
emergence of an electric dipole induced by a single spin or by two spins, where the spin …

The nearest-neighbor spins in the one-dimensional spin-1/2 XX model with the added
Dzyaloshinskii-Moriya (DM) interaction are entangled at zero temperature. In the presence …

We consider the square-lattice antiferromagnetic Heisenberg Hamiltonian extended with a
single-ion axial anisotropy term as a minimal model for the multiferroic Ba 2 CoGe 2 O 7 …