Abstract
BiFeO3 (BFO) thin films were deposited on Pt/Ta/glass substrates by pulsed laser deposition. To grow highly (111)-oriented and good adhesive Pt bottom electrodes, Ta adhesion layers were used between Pt bottom electrodes and glass substrates. On the highly (111)-oriented Pt bottom electrodes, highly (111)-oriented polycrystalline BFO thin films were obtained as confirmed by X-ray diffraction experiments. The BFO thin film exhibited a high ferroelectric polarization (2Pr≈56μC/cm2). The highly (111)-oriented BFO thin film also showed a ferromagnetic hysteresis loop and a ferroelectric domain size of approximately 30–40nm, which is equivalent to 0.25Tbit/in2.
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