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Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films
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View: Figures


Image of FIG. 1.
FIG. 1.

The out-of-plane hard axis magnetic hysteresis loop of the 10 nm Co electrode measured by PMOKE. Upper inset: Schematic of the heterostructure. Lower inset: top view of the sample showing the electrode geometry.

Image of FIG. 2.
FIG. 2.

Pyroelectric current (proportional to ferroelectric polarization) as a function of increasing (solid circle) and decreasing (open circle) applied magnetic field perpendicular to the sample plane. The curves labeled (a) and (b) correspond to the two different ferroelectric polarization directions of the sample. Arrows indicate the relative orientation of the polarization and applied magnetic field . The solid line is a fit to one set of data (see text). Inset: measurements of the pyroelectric current vs applied voltage showing the ferroelectric polarization hysteresis loop.

Image of FIG. 3.
FIG. 3.

Ferroelectric polarization as a function of applied magnetic field perpendicular to the sample plane, after out-of-plane magnetic saturation (red circles) and after demagnetization (blue triangles). (Upper inset) Schematic diagram of the strain gradient in the ferroelectric layer due to magnetostriction in the upper ferromagnetic electrode. (Lower inset) Calculation [from Eq. (1)] of the changes in polarization with applied field across a single domain wall for various values of , the angle between magnetization directions for two adjacent domains.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Magnetoelectric effects in ferromagnetic cobalt/ferroelectric copolymer multilayer films