Effect of sintering temperatures on the magnetoelectric properties of Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 ceramics

IF 0.9 4区材料科学 Q3 MATERIALS SCIENCE, CERAMICS Processing and Application of Ceramics Pub Date : 2022-01-01 DOI:10.2298/pac2202089a

Hongmin Ao, Heng Wu, Wenchuan Li, Mengshuang Lan, Zhixin Zeng, Qin Zhang, R. Gao, X. Deng, Gang Chen, C. Fu, Zhenhua Wang, X. Lei, W. Cai

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Abstract

Multiferroic materials attracted much attention because of magnetoelectric (ME) coupling effect. Herein, a typical single-phase multiferroic BiFeO3 (BFO) was co-doped at A and B sites by solid-state method, and Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 (BLSFTO) ceramics were prepared at different sintering temperatures (940, 960, 980 and, 1000?C). The effects of sintering temperature on the microstructure, morphology, dielectric, ferroelectric and magnetic properties were systematically studied. The remanent polarization (Pr) and coercive field (Ec) of the BLSFTO ceramics show a non-linear change with sintering temperature. The remanent polarization reaches maximum (0.0560 ?C/cm2) in the sample sintered at 1000?C, whereas the maximum Ec of 1.32 kV/cm was obtained in the specimen sintered at 940?C. The remanent magnetization (Mr) increases with the increase of sintering temperature, while change of the saturation magnetization with sintering temperature is negligible. When BLSFTO specimen is sintered at 1000?C, Mr reaches the maximal value of 0.1344 emu/g.

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烧结温度对Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3陶瓷磁电性能的影响

多铁材料的磁电耦合效应引起了人们的广泛关注。本文采用固相法在a、B位点共掺杂一种典型的单相多铁BiFeO3 (BFO)，并在不同的烧结温度(940、960、980、1000℃)下制备Bi0.78La0.08Sm0.14Fe0.85Ti0.15O3 (BLSFTO)陶瓷。系统研究了烧结温度对材料显微结构、形貌、介电性能、铁电性能和磁性能的影响。BLSFTO陶瓷的剩余极化(Pr)和矫顽力场(Ec)随烧结温度呈非线性变化。残余极化在1000℃烧结样品中达到最大值(0.0560℃/cm2)。而在940℃下烧结的试样，Ec最大值为1.32 kV/cm。剩余磁化强度随烧结温度的升高而增大，而饱和磁化强度随烧结温度的变化可以忽略不计。当BLSFTO试样在1000?C, Mr达到最大值0.1344 emu/g。

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