SYNTHESIS AND CHARACTERIZATIONS OF PURE AND DOPED NANOCRYSTALLINE BiFeO3 CERAMICS BY SHS

Ceramics-Silikáty

关键词: BiFeO3 Ceramics;    SHS;    XRD;    Ferroelectrics;    Multiferroics;    Dielectrics;   

DOI  :  

来源: DOAJ

【 摘 要 】

The pure and Zn incorporated BiFeO3 ceramics were synthesized by self-propagating high temperature synthesis (SHS). The X-ray diffractometer (XRD) studies revealed that, both BiFeO3 and BiFe0.95Zn0.05O3 ceramics crystallizes in a single phase rhombhohedral structure. The room temperature ferroelectric and magnetic hysteresis loop evidenced coexistence of ferroelectricity and magnetism in single phase undoped and Zn doped BiFeO3. The M-H hysteresis loop of BiFe0.95Zn0.05O3 sample demonstrated a weak ferromagnetism at 300 K and 5 K respectively. The room temperature ferroelectric P-E hysteresis loops of BiFeO3 and BiFe0.95Zn0.05O3 exhibited an unsaturated behavior and suggests a partial reversal of polarization. A variation of dielectric constant with respect to temperature in BiFeO3 and BiFe0.95Zn0.05O3 ceramic delivers a dielectric anomaly around 480 and 450°C which is a consequence of antiferromagnetic to paramagnetic phase transition (TN). Moreover, for BiFeO3 the anomaly manifests a possible coupling between electric and magnetic dipole moments.

【 授权许可】

Unknown