Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films

Mardana, Abhijit; Bai, Mengjun; Baruth, A.; Ducharme, Stephen; Adenwalla, Shireen

doi:10.1063/1.3488814

Cited by 20 publications

(13 citation statements)

References 19 publications

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“…Second, magnetostriction does not depend on the polarity of magnetic field; however, our data shows dependence on the polarity of the magnetic field. One possible explanation for the magneto-electric coupling effect is the following: the magnetic field generated by magnetized iron (this generated field is much larger than the external applied magnetic field) can exert a force on rotating dipoles of PVDF and affect the rotation of those dipoles [144,145,146,147]. When an external magnetic field is applied to the samples, the iron layers become magnetized.…”

Section: Magnetoelectric Coupling In Multiferroic Heterostructuresmentioning

confidence: 99%

Induced magneto-electric coupling at ferroelectric/ferromagnetic interface

Carvell

Cheng

Yang³

2013

Journal of Applied Physics

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We have demonstrated that at room temperature the electric polarization of a ferroelectric polymer, polyvinylidene fluoride (PVDF), in an artificial multiferroic structure can be controlled by applying an external magnetic field. We found that as the applied magnetic field is changed, the switching of electric polarization for the PVDF depends on the external magnetic field. We also noticed that both the electric coercivity and polarization of the PVDF polymer display hysteretic features as the applied magnetic field is changed. We found that the thickness of the PVDF layer has an effect on the magnetoelectric coupling strength in our samples. The coupling sensitivity increases as the PVDF layer thickness increases. It is possible to control the ferroelectric properties of a PVDF film by tuning the external magnetic field.

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Section: Magnetoelectric Coupling In Multiferroic Heterostructuresmentioning

confidence: 99%

Induced magneto-electric coupling at ferroelectric/ferromagnetic interface

Carvell

Cheng

Yang³

2013

Journal of Applied Physics

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“…Magnetic tunnel junctions 2,3 (MTJs) and ferroelectric tunnel junctions 4 (FTJs) using organic tunnel barriers have displayed distinctive behavior that is tied to the properties of the organic barrier. Devices based on organic thin films include high efficiency solar cells, [5][6][7] field-effect transistors (FETs), 8 flexible organic lightemitting diodes (OLEDs), 9 antireflection coatings, 10 and even magnetic field sensors, 11 all of which require conducting electrodes in intimate contact with organic thin films. In all cases, a clean, well-characterized interface between the organic thin film and the adjoining layer(s) is desirable, necessitating in situ vacuum deposition processes for the entire heterostructure.…”

Section: Introductionmentioning

confidence: 99%

Organic ferroelectric evaporator with substrate cooling and in situ transport capabilities

Foreman

Labedz

Shearer³

et al. 2014

Review of Scientific Instruments

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We report on the design, operation, and performance of a thermal evaporation chamber capable of evaporating organic thin films. Organic thin films are employed in a diverse range of devices and can provide insight into fundamental physical phenomena. However, growing organic thin films is often challenging and requires very specific deposition parameters. The chamber presented here is capable of cooling sample substrates to temperatures below 130 K and allows for the detachment of the sample from the cooling stage and in situ transport. This permits the use of multiple deposition techniques in separate, but connected, deposition chambers without breaking vacuum and therefore provides clean, well characterized interfaces between the organic thin film and any adjoining layers. We also demonstrate a successful thin film deposition of an organic material with a demanding set of deposition parameters, showcasing the success of this design. © 2014 AIP Publishing LLC.

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“…The most common and useful manifestation of such structures have been the piezoelectric/magnetostrictive laminate heterostructure. [8][9][10][11] The principle figures of merit (FOMs) include the coupling efficiency, which is measured as the induced field per applied electric field arising from the converse magnetoelectric effect (CME), or the electric field strength induced by magnetic field arising from the ME effect. These FOMs can be further distilled for the specific applications such as T ffiffiffiffiffi ffi Hz p for sensors.…”

Section: Introductionmentioning

confidence: 99%

Epitaxial growth of Pb(Zr0.53Ti0.47)O3 films on Pt coated magnetostrictive amorphous metallic substrates toward next generation multiferroic heterostructures

Chen

Yang

et al. 2012

Journal of Applied Physics

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Piezoelectric films of Pb(Zr0.53Ti0.47)O3 (PZT) were deposited by pulsed laser deposition onto metallic magnetostrictive substrates. In order to optimize the growth of PZT films, a buffer layer of Pt was employed, as well as variation of deposition temperature, pressure, and laser energy. Room temperature θ-2θ x-ray diffraction measurements indicate all diffraction features correspond to reflections indexed to a single PZT phase of space group P4mm. Scanning electron microscopy images reveal pinhole-free dense films of pyramidal shaped crystal arrangements whose orientation and size were controlled by variation of oxygen pressures during deposition. The resulting PZT films had a value of d33 ∼ 46 pm/V representing a 53% increase over previous efforts to realize a piezoelectric/Metglas™ film heterostructure.

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Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films

Abstract: Shireen, "Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films" (2010). Stephen Ducharme Publications. 69.

Cited by 20 publications

References 19 publications

Induced magneto-electric coupling at ferroelectric/ferromagnetic interface

Induced magneto-electric coupling at ferroelectric/ferromagnetic interface

Organic ferroelectric evaporator with substrate cooling and in situ transport capabilities

Epitaxial growth of Pb(Zr0.53Ti0.47)O3 films on Pt coated magnetostrictive amorphous metallic substrates toward next generation multiferroic heterostructures

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