Magnetoelectric and magnetodielectric properties of SBN–CMFO nanocomposites

Abstract

The paper reports synthesis of nanoparticles of Sr 0.5 Ba 0.5 Nb 2 O 6 (SBN) and Co 1.2-x Mn x Fe 1.8 O 4 (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 Bi 2 O 3 is used as a sintering aid. The Bi 2 O 3 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 stressinduced 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 %.

Investigations on Fe doped Ba0.95Sr0.05TiO3 single phase magnetodielectric compounds

“…The composites could be either particulate or multi-layered thick/thin film heterostructures [1][2][3][4][5][6][7][8]. In the second approach superlattices of ferroelectric and ferromagnetic compounds are prepared [9][10][11].…”