Multiferroic Properties of (1-x)BiFeO₃-xBaTiO₃ Lead-Free Ceramics

Abstract

Lead-free (1-x)BiFeO₃-xBaTiO₃ ceramics (abbreviated as BF-xBT), in a composition range of 0.23 ≤ x ≤ 0.33 mol%, were prepared by the conventional solid-state reaction method. The effect of x content on phase structure, microstructure, magnetic and electrical properties of BF-xBT ceramics is also investigated. With the incorporation of x content, the coexistence of rhombohedral and tetragonal phases was observed. Field emission scanning electron microscope (FESEM) micrographs revealed that the average grain size of BF-xBT ceramics first decreased and then increased with adding x content. The fracture surface of samples showed a mode of inter-granular fracture and intra-granular fracture. The ferroelectric properties were enhanced by adding x ≥ 0.29 mol% in the BF-xBT system. The dielectric and magnetic properties were improved with a maximum value are ε_r = 888,711, M_max = 0.40 emu/g, M_r = 0.17 emu/g, and H_c = 3.7 kOe at x = 0.25 mol%

Keywords:

• BiFeO₃–BaTiO₃
• multiferroic materials
• microstructure
• ferroelectric and magnetic properties

Disclosure Statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported financially by The National Science, Research and Innovation Fund (NSRF) through Naresuan University (R2565B059). The authors wish to thank the Faculty of Science and Technology, Pibulsongkram Rajabhat University is also supported. This work received the best poster award from the International Conference and Exhibition on Science, Technology and Engineering of Materials (ISTEM2022).