Magnetoelectric properties of Co-doped BiFeO₃ nanoparticles

Abstract

The magnetoelectric (ME) properties of sol–gel grown BiFe[Formula: see text]Co[Formula: see text]O3 (BFCO) nanoceramics, with different sizes, were investigated at room-temperature. X-ray diffraction (XRD) measurement was performed to investigate structural properties of the samples understudy. Magnetic field-dependent dielectric permittivity has been systematically investigated in the frequency range of 20 Hz to 1 MHz. To ensure the origin of magnetodielectric response, the magnetoimpedance (MI) spectroscopy was adopted using equivalent circuit model. The a.c. conductivity was found to obey the Jonscher’s universal power law. The modifications in spiral spin structure in the BFCO nanoparticles with size less than [Formula: see text]62 nm significantly affect the ME coupling parameters.

In silico assessment of electrophysiological neuronal recordings mediated by magnetoelectric nanoparticles

“…One of the most common composites used in these efforts is a cobalt ferrite (CFO) and barium titanate (BTO) core-shell conjugate (CFO-BTO) due to its high magnetoelectric coupling coefficient and relatively low toxicity, but other emerging composites such as BTO/iron oxide 49,50 (α = 28.78 mV/cm•Oe), cobalt-doped BiFeO 3 51,52 (α = 6.5 V/cm•Oe), CFO/BTO/polydopamine-P(VDF-TrFE) 53 (α E33 = 150.58 mV/cm•Oe), and BTO/nickel 54 (α = 225 µV/cm•Oe) are paving the way to an expanded toolkit of magnetoelectric probes and sensors. With appropriate biocompatible surface functionalization, new magnetoelectric compounds are expanding usability and improving safety for both SPIONs and MENPs for MPI [55][56][57] .…”