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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.
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]
Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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  Label: Title
  Group: Ti
  Data: 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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  Data: <searchLink fieldCode="AR" term="%22Lin%2C+Nanxi%22">Lin, Nanxi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhang%2C+Hong%22">Zhang, Hong</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shi%2C+Yunye%22">Shi, Yunye</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xu%2C+Chenjun%22">Xu, Chenjun</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xie%2C+Zhuoqian%22">Xie, Zhuoqian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Yunjin%22">Chen, Yunjin</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Materials+%281996-1944%29%22">Materials (1996-1944)</searchLink>. Jul2025, Vol. 18 Issue 13, p2953. 15p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetooptics%22">Magnetooptics</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+properties%22">Magnetic properties</searchLink><br /><searchLink fieldCode="DE" term="%22Strontium+titanate%22">Strontium titanate</searchLink><br /><searchLink fieldCode="DE" term="%22Bismuth+iron+oxide%22">Bismuth iron oxide</searchLink><br /><searchLink fieldCode="DE" term="%22Thin+films%22">Thin films</searchLink><br /><searchLink fieldCode="DE" term="%22Doping+agents+%28Chemistry%29%22">Doping agents (Chemistry)</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: 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]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Materials (1996-1944) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/ma18132953
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      – Code: eng
        Text: English
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        PageCount: 15
        StartPage: 2953
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      – SubjectFull: Magnetooptics
        Type: general
      – SubjectFull: Magnetic properties
        Type: general
      – SubjectFull: Strontium titanate
        Type: general
      – SubjectFull: Bismuth iron oxide
        Type: general
      – SubjectFull: Thin films
        Type: general
      – SubjectFull: Doping agents (Chemistry)
        Type: general
    Titles:
      – TitleFull: 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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          Name:
            NameFull: Lin, Nanxi
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            NameFull: Zhang, Hong
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            NameFull: Xu, Chenjun
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            NameFull: Xie, Zhuoqian
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            – D: 01
              M: 07
              Text: Jul2025
              Type: published
              Y: 2025
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              Value: 18
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              Value: 13
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            – TitleFull: Materials (1996-1944)
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