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Dynamic magnetoelectric coupling in “electronic ferroelectric”
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View: Figures


Image of FIG. 1.
FIG. 1.

(Color online) X-ray diffraction and spectroscopic data of (LFO) used in the present study. (a) High-resolution XRD pattern obtained using synchrotron radiation with the calibrated wavelength of . (b) X-ray photoelectron spectrum of the Fe lines for the binding energy between 705 and .

Image of FIG. 2.
FIG. 2.

(Color online) Summary of dielectric, ferroelectric, and pyroelectric responses of the rhombohedral LFO. (a) Temperature-dependent relative dielectric permittivity at six measuring ac frequencies. (b) Polarization-electric field hysteresis loops at , measured using an ac frequency of . (c) Pyroelectric coefficient plotted as a function of temperature. For the measurement, a bias electric field of (at low temperatures) was applied during the cooling down to . The pyroelectric current was recorded during the heating using a picoammeter.

Image of FIG. 3.
FIG. 3.

Magnetic data of the rhombohedral LFO. (a) A magnetization-field curve at room temperature. (b) Two low-field curves measured after ZFC and FC.

Image of FIG. 4.
FIG. 4.

(Color online) Longitudinal ME voltage coefficient plotted as a function of the static magnetic field at two different oscillating magnetic-field frequencies , 10 and . The polycrystalline LFO pellet was electrically poled at before ME measurements.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Dynamic magnetoelectric coupling in “electronic ferroelectric” LuFe2O4