Induction of Strong Magneto-Optical Effect and High Compatibility with Si of BiFeO 3 Thin Film by Sr and Ti Co-Doping.
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| Title: | Induction of Strong Magneto-Optical Effect and High Compatibility with Si of BiFeO 3 Thin Film by Sr and Ti Co-Doping. |
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| Authors: | Lin, Nanxi1 (AUTHOR), Zhang, Hong1,2 (AUTHOR), Shi, Yunye1 (AUTHOR), Xu, Chenjun1,2 (AUTHOR), Xie, Zhuoqian1 (AUTHOR), Chen, Yunjin2 (AUTHOR) |
| Source: | Materials (1996-1944). Jul2025, Vol. 18 Issue 13, p2953. 15p. |
| Subjects: | Magnetooptics, Magnetic properties, Strontium titanate, Bismuth iron oxide, Thin films, Doping agents (Chemistry) |
| Abstract: | The poor magnetic and magneto-optical properties of BiFeO3, along with its significant lattice mismatch with silicon, have limited its application in silicon-based integrated magneto-optical devices. In this study, co-doping with Sr2+ and Ti4+ ions effectively transformed the trigonal structure of BiFeO3 into a cubic phase, thereby reducing the lattice mismatch with silicon to 2.8%. High-quality, highly oriented, silicon-based cubic Sr,Ti:BiFeO3 thin films were successfully fabricated using radio frequency magnetron sputtering. Due to the induced lattice distortion, the characteristic periodic spiral spin antiferromagnetic structure of BiFeO3 was suppressed, resulting in a significant enhancement of the saturation magnetization of cubic Bi0.5Sr0.5Fe0.5Ti0.5O3 (48.0 emu/cm3), compared to that of pristine BiFeO3 (5.0 emu/cm3). Furthermore, the incorporation of Sr2+ and Ti4+ ions eliminated the birefringence effect inherent in trigonal BiFeO3, thereby inducing a pronounced magneto-optical effect in the cubic Sr,Ti:BiFeO3 thin film. The magnetic circular dichroic ellipticity (ψF) of Bi0.5Sr0.5Fe0.5Ti0.5O3 reached an impressive 2300 degrees/cm. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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| Abstract: | The poor magnetic and magneto-optical properties of BiFeO3, along with its significant lattice mismatch with silicon, have limited its application in silicon-based integrated magneto-optical devices. In this study, co-doping with Sr2+ and Ti4+ ions effectively transformed the trigonal structure of BiFeO3 into a cubic phase, thereby reducing the lattice mismatch with silicon to 2.8%. High-quality, highly oriented, silicon-based cubic Sr,Ti:BiFeO3 thin films were successfully fabricated using radio frequency magnetron sputtering. Due to the induced lattice distortion, the characteristic periodic spiral spin antiferromagnetic structure of BiFeO3 was suppressed, resulting in a significant enhancement of the saturation magnetization of cubic Bi0.5Sr0.5Fe0.5Ti0.5O3 (48.0 emu/cm3), compared to that of pristine BiFeO3 (5.0 emu/cm3). Furthermore, the incorporation of Sr2+ and Ti4+ ions eliminated the birefringence effect inherent in trigonal BiFeO3, thereby inducing a pronounced magneto-optical effect in the cubic Sr,Ti:BiFeO3 thin film. The magnetic circular dichroic ellipticity (ψF) of Bi0.5Sr0.5Fe0.5Ti0.5O3 reached an impressive 2300 degrees/cm. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 19961944 |
| DOI: | 10.3390/ma18132953 |
