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. 2016 Oct 26;7:13232. doi: 10.1038/ncomms13232

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Copyright © 2016, The Author(s)

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(a) Areal density of the magnetic moment amplitude induced by electric field M_E/A in the magnetic field along the hard axis is determined in two ways: (i) by applying a low-frequency sinusoidal electric field (open symbols) or (ii) by modulating the d.c. electric field by an a.c. electric field of amplitude E_mod=0.26 MV cm⁻¹ and displaying the integrated signal (closed symbols). This configuration is investigated at 2 and 5 kOe (sample A). Solid lines: theory. (b) Results for the easy axis configuration investigated at 5 kOe by the second method. The upper scales show the gate voltage V_G corresponding to the electric field E.