Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7990459 | Journal of Alloys and Compounds | 2018 | 10 Pages |
Abstract
The Aurivillius Bi5Fe1-xNixTi3O15 (BFNT-x) (0â¤xâ¤0.5) thin films were deposited by chemical solution deposition route. The microstructures, electrical and magnetic properties were systematically investigated in BFNT films. It has been found that the c-orientation of the films increases with the increase of Ni content. The coexistence of weak ferromagnetism and ferroelectricity at room temperature were observed in BFNT films except the xâ¯=â¯0.5 sample. The BFNT-0.1 sample exhibits a maximum remnant polarization 2Pr â¼49.3â¯Î¼C/cm2, which is enhanced by 12.6% compared with that of the Ni-free thin film. The leakage current is decreased evidently with Ni content less than 0.3. The BFNT-0.1 film also shows the highest remnant magnetization 2Mr â¼2.14 emu/cm3. The origins of weak ferromagnetism in the BFNT films are attributed to the spin canting of the antiferromagnetic (AFM) coupling caused by Dzyaloshinskii-Moriya (DM) interaction based the Fe-O and Ni-O octahedral and affected by other causes as discussed. The saturation magnetization values of in-plane loops are smaller than that of the out-of-plane loops, indicating obvious anisotropic magnetism. These results demonstrate that partial substitution of Ni for Fe is an effective way for improving the multiferroic properties of Aurivillius compounds.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Hui Sun, Yuying Wu, Tianshu Yao, Yuxi Lu, Hui Shen, Fengzhen Huang, Xiaobing Chen,