Figure 1: Structural and magnetic characterization: evidence for a magnetic Cu state at both interfaces. | Nature Communications

Figure 1: Structural and magnetic characterization: evidence for a magnetic Cu state at both interfaces.

From: Reversible electric-field control of magnetization at oxide interfaces

Figure 1

(a) Low magnification STEM image showing that the PBCO barrier is continuous over long lateral distances. A high resolution STEM image is also shown. Mn oxidation state across the stacking, obtained through the analysis of the EELS O K-edge fine structure32. (b) Magnetization loop of a LCMO (8 nm)/PBCO (6 nm)/LCMO (25 nm) trilayer obtained from fitting (see Methods section) polarized neutron reflectometry data, after saturating in a negative field applied in the [110] direction at 12 K (solid lines are guides for the eye). (c) Evolution of the angle between substrate [100] direction and the magnetizations of top (red symbols) and bottom (blue symbols) LCMO electrodes during magnetization switching as a function of magnetic field applied along [110] (that is, at 45°). At the second field point (H=18.4 Oe, open symbols), the data can be described by a model including two large domains with different magnetization vectors, rather than a single domain. The solid black line represents values calculated by minimizing anisotropy and Zeeman energy terms for the bottom LCMO layer’s angle, assuming uniaxial anisotropy along the [100] direction.

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