Journal Article magnetoelectric coupling 2D materials 3D boron frameworks A-site ordered perovskite Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. cooling field delocalized π-bonds double perovskite ferromagnetic TMDCs ferrotoroidic order high pressure high-pressure synthesis hydrostatic pressure iron-pnictides low temperature magnetic domain metal-to-insulator transition metallic electric resistivity multiferroic multiferroics nuclear resonant scattering phonon density of states single-phase material spin chain spin-orbit coupling toroidal moments van der Waals interaction engineering