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|Title:||Optimized magnetodielectric coupling on high-temperature polymer-based nanocomposites|
Vilas, J. L.
Kolen'Ko, Y. V.
Martins, Pedro Libânio Abreu
|Publisher:||American Chemical Society|
|Journal:||The Journal of Physical Chemistry C|
|Abstract(s):||CoFe2O4 (CFO) ferrite nanoparticles with an average size of 15 nm were synthesized by a hydrothermal method and used to develop magnetodielectric (MD) composites with the piezoelectric diamine 2CN/diamine 0CN as polymer matrix . It is shown that the dielectric constant, dielectric loss, and saturation magnetization values of the composites increase with the increasing CFO content, being 4.4, 0.01, and 12 emu.g-1, respectively, for the sample with 20 weight percentage (wt.%) of ferrite. Additionally the large MD response (MD (%)=10.15 and magnetodielectric coefficient (γ)=5.8x10-2) demonstrates the effective magneto-mechano-electrical interaction between magnetostrictive CFO and the polymer matrix. Such high MD response, the highest reported for polymer-based composite materials, can support innovative applications in the areas of sensors, actuators, and filters, among others.|
|Access:||Embargoed access (2 Years)|
|Appears in Collections:||CDF - FCD - Artigos/Papers (with refereeing)|