Epitaxial Growth and Multiferroic Properties of (001)-Oriented BiFeO3-YMnO3 Films

Polarization Switching and Photoinduced Dielectric and Ferroelectric Properties in YMnO3/La0.67Sr0.33MnO3 Heterostructure

“…The hysteresis loops of YMO/LSMO heterostructure with photo excitation in the same testing parameters are shown in Figure b. The sample could not reach full saturation and exhibits poor loop preferably at higher temperature, which may be due to the leakage current of the semiconducting nature in YMO and the resistivity of the structure. − Therefore, to eliminate the nonhysteretic polarization, the intrinsic P r of YMO thin films was measured by the positive-up negative-down (PUND) method simultaneously, , as shown in Figure S3. The 2 P r is 0.71 μC/cm 2 in the applied electric field of 40 kV/cm at T = 300 K, which is smaller than the P r (Figure a) measured by a Sawyer–Tower circuit measurement, confirming the part played by the leakage current.…”