Full text loading...
(Color online) Microstructure morphology of the sample solidified in microgravity, showing that the eutectic grain grew with random direction.
Thermomagnetic curves below 100 K. Curve I represents the first thermomagnetization process from 5 K to 100 K after quenching to 5 K in ZFC. An irreversible peak around 50 K is observed. The curves II, III, and IV are the sequenced thermomagnetization measurements. The susceptibility peak becomes rounded and completely suppressed during the sequenced measurements.
Demagnetization curves at various temperatures. A jump occurs at a field of −1 T. The amplitude and direction of the jump are strongly temperature dependent. Below 50 K, the amplitude decreases with increasing temperature. When temperature passes through 50 K, the jump direction in the magnetization curves reverses from downward to upward. This anomalous magnetization behavior has not been observed for the amorphous BiFeO3 film quenched by rollers.
Typical microstructure image and electron diffraction pattern obtained by TEM. Nano-particles dispersed along the edge of the specimen, as illustrated in A. The matrix diffraction pattern shows the coexistence of a halo and spots, indicating that the material consisted of both microcrystalline and amorphous microstructures.
Article metrics loading...