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- W2896584737 abstract "The CoFe2O4 (CFO) thin films are prepared by the sol-gel method combined with the spin-casting process, and the related SEM and XRD results show that a 9-layer spinning of the original sol together with an annealing temperature of 700 °C is the appropriate condition for obtaining this CFO film with an excellent magnetic performance. The CFO films are subsequently compounded with a ferroelectric copolymer poly(vinylidene fluoride-co-trifluoroethylene) [P(VDF-co-TrFE)]. After polarizing the obtained CFO/P(VDF-co-TrFE) double-layer composite film under a high electrical field of 275 MV/m, the P(VDF-co-TrFE) layer shows the character of normal ferroelectricity that has a large dielectric permittivity (ɛ33/ɛ0 = 9.5) and a high piezoelectric value (d31 = 20 pC/N). Interestingly, we also find that the magnetization of this electrically poled CFO/P(VDF-co-TrFE) film increases from 85.58 to 99.15 emu/cm3 at a magnetic field of 1.8 T since the electrostrictive effect may lead to the re-orientation of magnetic domains and thereby resulting in a magnetization easy-axis reorientation effect in the out-of-plane direction of the CFO thin film. Consequently, a large magnetoelectric coupling coefficient (αE31) of 508.5 MV/cm Oe is obtained through calculation provided the interfaces between CFO and P(VDF-co-TrFE) have an appropriate compatible coefficient of about 0.5. The results indicate that the CFO/P(VDF-co-TrFE) double-layer film is a potential multiferroic composite as an attractive candidate for memory storage and spintronic devices." @default.
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- W2896584737 date "2018-10-21" @default.
- W2896584737 modified "2023-09-25" @default.
- W2896584737 title "The magnetoelectric effect of the CFO thin film by coupling a P(VDF-<i>co</i>-TrFE) piezoelectric layer" @default.
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- W2896584737 doi "https://doi.org/10.1063/1.5049493" @default.
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