Magnetoelectric and magnetodielectric properties of SBN–CMFO nanocomposites

TLDR: In this paper, the authors reported synthesis of nanoparticles of Sr0.5Ba0.6 and Co1.2−xMnxFe1.8O4 via ceramic and hydroxide co-precipitation routes, respectively.

Abstract: The paper reports synthesis of nanoparticles of Sr0.5Ba0.5Nb2O6 (SBN) and Co1.2−xMnxFe1.8O4 (CMFO) via ceramic and hydroxide co-precipitation routes, respectively. The nanopowders of SBN–CMFO0.1 (MSBN0.1) and SBN–CMFO0.3 (MSBN0.3) are compacted together to form the desired magnetoelectric/magnetodielectric (ME/MD) composites. The Bi2O3 is used as a sintering aid. The Bi2O3 at three weight percent is observed to cause agglomeration of SBN and CMFO particles and improve the magnetomechanical coupling. The paper reports synthesis, structural and morphological studies on the MSBN composites. The composites are investigated for their dielectric, ME and MD properties. The results on the magnetocapacitance (MC) are observed interesting and could be correctly understood in terms of the stress-induced variation in the dielectric constant. The MC is observed to remain fairly constant between 10 and 500 kHz and possess a useful magnitude of nearly 4 %.