Multiferroic and resistive switching properties of BiFeO 3 nanoparticles were improved by dilute aliovalent Li 1+ doping.
We report a potential way to enhance and tune the multiferroic and resistive switching properties of BiFeO 3 nanoparticles through dilute aliovalent Li 1+ doping (0.046 atomic percent) at the Fe 3+ sites of BiFeO 3. The high purity of the samples and the extent of doping were confirmed by different physical characterizations. Enhanced multiferroic properties with a magnetic moment per Fe atom ≈ 0.12 μ B and electric polarization ≈ 49 μC cm −2 were observed in one of the Li 1+ doped samples. A phenomenological model has been proposed to support the observed magnetic behavior of the doped samples. From a potential application point of view, we further report on the doping concentration and polarization coercivity dependent highly stable resistive switching behavior (endurance cycles >10 3 and stability >10 6 s) of Li-doped BiFeO 3 nanoparticles. The stable complementary resistive switching behavior (1 bit operation) for >50 cycles and under voltage pulse for 10 3 cycles in the doped BiFeO 3 at a low operating bias is reported. Thus, dilute aliovalent Li 1+ doping enables tunability of the ferroic and resistive switching properties of BiFeO 3and shows it to be a promising multiferroic material.