Fine-grained Magnetoelectric Sr0.5Ba0.5Nb2O6–CoFe2O4 Composites Synthesized by a Straightforward One-pot Method

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Magnetoelectric (Sr0.5Ba0.5Nb2O6)1􀀀x􀀀(CoFe2O4)x (x = 0.2–0.6) composites were prepared by a one-pot softchemistry synthesis using PEG400. Calcining at 700 ◦C resulted in nanocrystalline composite powders (dcryst. = 24–30 nm) which were sintered between 1050 and 1200 ◦C to ceramic bodies with relative densities up to 98%. SEM investigations confirm the formation of composite ceramics with a 0–3 connectivity and variable grain sizes from 0.2 to 3.6 μm for sintering up to 1150 ◦C, while sintering at 1200 ◦C leads both to a change in the microstructure and a considerable grain growth. Magnetic measurements at 300 K reveal ferrimagnetic behaviour with saturation magnetization values smaller than bulk CoFe2O4 and coercivities between 790 and 160 Oe. Temperature-dependent impedance spectroscopy showed that the relative permittivities decrease both with rising frequency and CoFe2O4 fraction. The frequency dependence of the impedance can be well described using a single RC circuit. Magnetoelectric measurements show the presence of pronounced field hystereses. The maximum magnetoelectric coefficient (αME) depends both on the CoFe2O4 fraction (x) and sintering temperature. The composite with x = 0.3 exhibits the largest αME value of 37 μV Oe􀀀1 cm􀀀1 (@ 900 Hz). With rising frequency of the AC driving field αME increases up to 300–400 Hz and is nearly constant until 1 kHz.

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APA

Koferstein, R. (2021). Fine-grained Magnetoelectric Sr0.5Ba0.5Nb2O6–CoFe2O4 Composites Synthesized by a Straightforward One-pot Method. Afribary. Retrieved from https://afribary.com/works/fine-grained-magnetoelectric-sr0-5ba0-5nb2o6-cofe2o4-composites-synthesized-by-a-straightforward-one-pot-method

MLA 8th

Koferstein, Roberto "Fine-grained Magnetoelectric Sr0.5Ba0.5Nb2O6–CoFe2O4 Composites Synthesized by a Straightforward One-pot Method" Afribary. Afribary, 26 Dec. 2021, https://afribary.com/works/fine-grained-magnetoelectric-sr0-5ba0-5nb2o6-cofe2o4-composites-synthesized-by-a-straightforward-one-pot-method. Accessed 03 Jul. 2022.

MLA7

Koferstein, Roberto . "Fine-grained Magnetoelectric Sr0.5Ba0.5Nb2O6–CoFe2O4 Composites Synthesized by a Straightforward One-pot Method". Afribary, Afribary, 26 Dec. 2021. Web. 03 Jul. 2022. < https://afribary.com/works/fine-grained-magnetoelectric-sr0-5ba0-5nb2o6-cofe2o4-composites-synthesized-by-a-straightforward-one-pot-method >.

Chicago

Koferstein, Roberto . "Fine-grained Magnetoelectric Sr0.5Ba0.5Nb2O6–CoFe2O4 Composites Synthesized by a Straightforward One-pot Method" Afribary (2021). Accessed July 03, 2022. https://afribary.com/works/fine-grained-magnetoelectric-sr0-5ba0-5nb2o6-cofe2o4-composites-synthesized-by-a-straightforward-one-pot-method