Jung Hoon Han

TL;DR: Real-space imaging of a two-dimensional skyrmion lattice in a thin film of Fe0.5Co 0.5Si using Lorentz transmission electron microscopy reveals a controlled nanometre-scale spin topology, which may be useful in observing unconventional magneto-transport effects.

TL;DR: A new dissipation mechanism in noncollinear spin textures that can lead to a much faster spin relaxation than Gilbert damping is found.

TL;DR: In this paper, a Monte Carlo simulation study of a classical spin model with Dzyalosinskii-Moriya interaction and the spin anisotropy under the magnetic field is presented.

TL;DR: The discovery of ferroelectrically tunable skyrmions in ultrathin BaTiO3/SrRuO3 bilayer heterostructures is reported and can simultaneously enhance the integratability and addressability ofskyrmion-based functional devices.

TL;DR: In this paper, a microscopic theory of magnetically induced ferroelectricity and lattice modulation is presented for various electron configurations of Mott-insulating transition metal oxides, and predictions for x-ray and neutron scattering experiments are proposed to clarify the microscopic mechanism of spin-polarization coupling in different materials.