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Sol-gel synthesized (1-x)Bi0.5Na0.5TiO3-xAlMnO3 perovskites with enhanced ferromagnetic property.

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Title: Sol-gel synthesized (1-x)Bi0.5Na0.5TiO3-xAlMnO3 perovskites with enhanced ferromagnetic property.
Authors: Lam, Nguyen Huu1,2 (AUTHOR), Dung, Dang Duc1 (AUTHOR) dung.dangduc@hust.edu.vn
Source: Ceramics International. Aug2025:Part A, Vol. 51 Issue 19, p27895-27902. 8p.
Subjects: Magnetic coupling, Diffractive scattering, Ferroelectric materials, Raman scattering, Sol-gel processes
Abstract: In this work, (1- x)Bi 0.5 Na 0.5 TiO 3 - x AlMnO 3 (x = 0, 0.5, 1, 3, 5, 7, and 9 mol.%) materials were synthesized using a sol-gel method. X-ray diffraction and Raman scattering analyses confirmed the successful incorporation of AlMnO 3 into the Bi 0.5 Na 0.5 TiO 3 lattice. The results demonstrated a random substitution of Al and Mn cations, leading to lattice distortions and modifications in vibrational properties. Optical studies revealed a reduction in the band gap with increasing AlMnO 3 content, decreasing from 3.07 eV for pure Bi 0.5 Na 0.5 TiO 3 to 1.85 eV at 3 mol.% AlMnO 3. Additionally, magnetic measurements at room temperature uncovered complex magnetic behavior in AlMnO 3 -modified Bi0.5 Na 0.5 TiO 3. While pure Bi 0.5 Na 0.5 TiO 3 exhibited weak ferromagnetism with dominant diamagnetic effects, the addition of AlMnO 3 enhanced ferromagnetic ordering. This enhancement is attributed to oxygen vacancy-mediated Mn magnetic coupling, as well as the emergence of Na vacancies and Ti3+/Ti2+ states. At higher AlMnO 3 concentrations, a combination of ferromagnetic, paramagnetic, and antiferromagnetic-like behaviors was observed. These findings provide valuable insights into enhancing ferromagnetic properties of lead-free ferroelectric materials, paving the way for their use in advanced smart electronic devices. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. 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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  Data: Sol-gel synthesized (1-x)Bi0.5Na0.5TiO3-xAlMnO3 perovskites with enhanced ferromagnetic property.
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  Data: <searchLink fieldCode="AR" term="%22Lam%2C+Nguyen+Huu%22">Lam, Nguyen Huu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Dung%2C+Dang+Duc%22">Dung, Dang Duc</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> dung.dangduc@hust.edu.vn</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Aug2025:Part A, Vol. 51 Issue 19, p27895-27902. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Magnetic+coupling%22">Magnetic coupling</searchLink><br /><searchLink fieldCode="DE" term="%22Diffractive+scattering%22">Diffractive scattering</searchLink><br /><searchLink fieldCode="DE" term="%22Ferroelectric+materials%22">Ferroelectric materials</searchLink><br /><searchLink fieldCode="DE" term="%22Raman+scattering%22">Raman scattering</searchLink><br /><searchLink fieldCode="DE" term="%22Sol-gel+processes%22">Sol-gel processes</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: In this work, (1- x)Bi 0.5 Na 0.5 TiO 3 - x AlMnO 3 (x = 0, 0.5, 1, 3, 5, 7, and 9 mol.%) materials were synthesized using a sol-gel method. X-ray diffraction and Raman scattering analyses confirmed the successful incorporation of AlMnO 3 into the Bi 0.5 Na 0.5 TiO 3 lattice. The results demonstrated a random substitution of Al and Mn cations, leading to lattice distortions and modifications in vibrational properties. Optical studies revealed a reduction in the band gap with increasing AlMnO 3 content, decreasing from 3.07 eV for pure Bi 0.5 Na 0.5 TiO 3 to 1.85 eV at 3 mol.% AlMnO 3. Additionally, magnetic measurements at room temperature uncovered complex magnetic behavior in AlMnO 3 -modified Bi0.5 Na 0.5 TiO 3. While pure Bi 0.5 Na 0.5 TiO 3 exhibited weak ferromagnetism with dominant diamagnetic effects, the addition of AlMnO 3 enhanced ferromagnetic ordering. This enhancement is attributed to oxygen vacancy-mediated Mn magnetic coupling, as well as the emergence of Na vacancies and Ti3+/Ti2+ states. At higher AlMnO 3 concentrations, a combination of ferromagnetic, paramagnetic, and antiferromagnetic-like behaviors was observed. These findings provide valuable insights into enhancing ferromagnetic properties of lead-free ferroelectric materials, paving the way for their use in advanced smart electronic devices. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
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  Data: <i>Copyright of Ceramics International is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.ceramint.2025.04.004
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      – Code: eng
        Text: English
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        PageCount: 8
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      – SubjectFull: Magnetic coupling
        Type: general
      – SubjectFull: Diffractive scattering
        Type: general
      – SubjectFull: Ferroelectric materials
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      – SubjectFull: Raman scattering
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      – SubjectFull: Sol-gel processes
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      – TitleFull: Sol-gel synthesized (1-x)Bi0.5Na0.5TiO3-xAlMnO3 perovskites with enhanced ferromagnetic property.
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              M: 08
              Text: Aug2025:Part A
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              Y: 2025
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