Tuning ferroelectrics to antiferroelectrics in multiferroic LaxSr1?xFe12O19 ceramics

The combination of antiferroelectricity (AFE) and ferromagnetism (FM) in one structure would allow the development new type multiferroic candidates, which be applicable not only magnetoelectric memories but also novel energy storage devices. Here we propose a candidate LaxSr1-xFe12O19, whose room temperature state could betuned from ferroelectrics (FE) to antiferroelectrics by changing x 0 0.5. emphasis this paper will focused on La0.5Sr0.5Fe12O19 system, full AFE FM coexist. pure antiferroelectric behavior ceramics is demonstrated double polarization-electric field (P-E) hysteresis loops, are fully separated linear component with zero net polarization. material La0.2Sr0.7Fe12O19 intermediate composition exhibits hybrid ferroelectric/antiferroelectric state. recoverable density phase reaches 14.3 J/cm3. This demonstrates strong coupling giant magnetoresistance (GMR) effect. A 1.1T magnetic generates electronic polarization up 0.95uC/cm2, reduce resistance 117%, enhances dielectric constants 540% right shifts maximum loss peak 208 kHz. combined functional responses provide an opportunity develop multifunctional electric