Pressure effect on multiferroics investigation with neutron scattering*

Multiferroics have attracted tremendous research interests with their rich physics and potential in constructing next-generation multifunctional devices. The type-II multiferroics have magnetic phase related ferroelectricity. In a system where the magnetic phase is closely correlated with crystal lattice, compressing the unit cell with high pressure would lead to distinct magnetic phase transitions and then tune the ferroelectricity. We studied systems mainly with neutron scattering techniques in identifying their magnetic phase transitions under pressures to provide understanding for change of the ferroelectric properties in the system.