Effect of sintering temperature on magnetoelectric properties of barium ferrite ceramics

• Published in: Journal of materials research 2022-09, Vol.37 (17), p.2837-2847
• Main Authors: Lan, Mengshuang, Zeng, Zhixin, Zhang, Qin, Sun, Guiyun, Wu, Heng, Ao, Hong, Deng, Xiaoling, Gao, Rongli, Cai, Wei, Wang, Zhenhua, Fu, Chunlin, Lei, Xiang, Chen, Gang
• Format: Article
• Language: English
• Subjects: Applied and Technical Physics; Barium hexaferrite; Biomaterials; Ceramics; Chemistry and Materials Science; Dielectric properties; Ferroelectric materials; Ferroelectricity; Functional materials; Grain size; Hysteresis loops; Inorganic Chemistry; Leakage current; Magnetic properties; Magnetic saturation; Materials Engineering; Materials research; Materials Science; Multiferroic materials; Nanotechnology; Room temperature; Sintering; Sol-gel processes; Temperature
• ISSN: 0884-2914; 2044-5326
• DOI: 10.1557/s43578-022-00679-y

As a new functional material, multiferroic materials have attracted much attention in recent years. In this paper, BaFe 12 O 19 (BaM) ceramics were prepared by the sol–gel method sintered at different temperatures. The effect of sintering temperature on microstructure, surface morphology, dielectric properties, ferroelectric properties and magnetic properties of BaM ceramics were systematically studied. XRD results show that the main diffraction peaks are attributed to BaM ceramics. SEM results show that the grain size of ceramics increases from 0.82 to 1.15 μm with the sintering temperature increase from 1150 to 1300 °C. At room temperature, when the sintering temperature is 1150 °C, the residual polarization, saturation magnetization and residual magnetization of ceramics reach the maximum, which are 0.064 μC/cm 2 , 67.145 emu/g, 34.722 emu/g, respectively. The changes of dielectric and ferroelectric properties under applied magnetic field indicate that BaM ceramics have certain magnetoelectric response, which provides a new direction for the development and application of BaM devices. Graphical abstract The effect of sintering temperature on the multiferroic properties of hexagonal barium ferrite (BaM) ceramics was studied. The ferroelectric and magnetic hysteresis loops of the ceramics indicate the room temperature multiferroic properties of the prepared ceramics. The effect of leakage current on ferroelectric properties of ceramics was also studied. It lays a foundation for the study of single-phase multiferroic materials at room temperature.