Unravelling the structure–magnetism coupling in Al-substituted BaSrCa (1:1:2)-based ferrite nanoparticles.
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| Title: | Unravelling the structure–magnetism coupling in Al-substituted BaSrCa (1:1:2)-based ferrite nanoparticles. |
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| Authors: | Althomali, Raed H.1 (AUTHOR) r.althomali@psau.edu.sa, Asif, Sana Ullah2 (AUTHOR) sanaullahasif@gmail.com |
| Source: | Modern Physics Letters B. 4/10/2026, Vol. 40 Issue 10, p1-18. 18p. |
| Subjects: | Magnetic properties, Coercive fields (Electronics), Lattice constants, Chemical synthesis, Magnetic coupling, Magnetization |
| Abstract: | Ba 0. 2 5 Sr 0. 2 5 Ca 0. 5 Fe 1 2 − x AlxO 1 9 (x = 0. 0 –3.0) M-type hexaferrites were synthesized by the sol–gel autocombustion technique to investigate the effect of Al substitution on structural and magnetic behavior. X-ray diffraction confirmed a single-phase hexagonal structure (P63/mmc, JCPDS No. 84-0757) with lattice parameters decreasing slightly from a = 5. 8 2 8 Å, c = 2 3. 1 8 5 Å to a = 5. 8 1 3 Å, c = 2 3. 1 5 9 Å, indicating lattice contraction with Al 3 + substitution. The crystallite size reduced from 62.22 nm to 49.95 nm (Scherrer method) and from 73.13 nm to 58.31 nm (Williamson–Hall method), whereas microstrain and porosity improved from 2. 7 4 × 1 0 − 4 to 4. 2 0 × 1 0 − 4 and from 11.70% to 14.11%, respectively. SEM micrographs revealed hexagonal platelet-like grains with sizes lessening from 300 nm to 450 nm (x = 0. 0) to 150–250 nm (x = 2. 0), confirming grain growth suppression by Al 3 + . Magnetic characterization exhibited a decrease in saturation magnetization (Ms) from 36.98 emu/g to 30.41 emu/g and an increase in coercivity (Hc) from 3.112 kOe to 3.827 kOe up to x = 2. 0 , followed by a minor decline at x = 3. 0. Curie temperature also decreased with increasing Al doping concentration due to the dilution of magnetic Fe 3 + ions. These results demonstrate that moderate Al substitution improves coercivity and anisotropy while sustaining structural stability, making the composition a promising contender for high-coercivity and microwave device applications. [ABSTRACT FROM AUTHOR] |
| Copyright of Modern Physics Letters B is the property of World Scientific Publishing Company 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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| Items | – Name: Title Label: Title Group: Ti Data: Unravelling the structure–magnetism coupling in Al-substituted BaSrCa (1:1:2)-based ferrite nanoparticles. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Althomali%2C+Raed+H%2E%22">Althomali, Raed H.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> r.althomali@psau.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Asif%2C+Sana+Ullah%22">Asif, Sana Ullah</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> sanaullahasif@gmail.com</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Modern+Physics+Letters+B%22">Modern Physics Letters B</searchLink>. 4/10/2026, Vol. 40 Issue 10, p1-18. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetic+properties%22">Magnetic properties</searchLink><br /><searchLink fieldCode="DE" term="%22Coercive+fields+%28Electronics%29%22">Coercive fields (Electronics)</searchLink><br /><searchLink fieldCode="DE" term="%22Lattice+constants%22">Lattice constants</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+synthesis%22">Chemical synthesis</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+coupling%22">Magnetic coupling</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetization%22">Magnetization</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Ba 0. 2 5 Sr 0. 2 5 Ca 0. 5 Fe 1 2 − x AlxO 1 9 (x = 0. 0 –3.0) M-type hexaferrites were synthesized by the sol–gel autocombustion technique to investigate the effect of Al substitution on structural and magnetic behavior. X-ray diffraction confirmed a single-phase hexagonal structure (P63/mmc, JCPDS No. 84-0757) with lattice parameters decreasing slightly from a = 5. 8 2 8 Å, c = 2 3. 1 8 5 Å to a = 5. 8 1 3 Å, c = 2 3. 1 5 9 Å, indicating lattice contraction with Al 3 + substitution. The crystallite size reduced from 62.22 nm to 49.95 nm (Scherrer method) and from 73.13 nm to 58.31 nm (Williamson–Hall method), whereas microstrain and porosity improved from 2. 7 4 × 1 0 − 4 to 4. 2 0 × 1 0 − 4 and from 11.70% to 14.11%, respectively. SEM micrographs revealed hexagonal platelet-like grains with sizes lessening from 300 nm to 450 nm (x = 0. 0) to 150–250 nm (x = 2. 0), confirming grain growth suppression by Al 3 + . Magnetic characterization exhibited a decrease in saturation magnetization (Ms) from 36.98 emu/g to 30.41 emu/g and an increase in coercivity (Hc) from 3.112 kOe to 3.827 kOe up to x = 2. 0 , followed by a minor decline at x = 3. 0. Curie temperature also decreased with increasing Al doping concentration due to the dilution of magnetic Fe 3 + ions. These results demonstrate that moderate Al substitution improves coercivity and anisotropy while sustaining structural stability, making the composition a promising contender for high-coercivity and microwave device applications. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Modern Physics Letters B is the property of World Scientific Publishing Company 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1142/S0217984926500582 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1 Subjects: – SubjectFull: Magnetic properties Type: general – SubjectFull: Coercive fields (Electronics) Type: general – SubjectFull: Lattice constants Type: general – SubjectFull: Chemical synthesis Type: general – SubjectFull: Magnetic coupling Type: general – SubjectFull: Magnetization Type: general Titles: – TitleFull: Unravelling the structure–magnetism coupling in Al-substituted BaSrCa (1:1:2)-based ferrite nanoparticles. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Althomali, Raed H. – PersonEntity: Name: NameFull: Asif, Sana Ullah IsPartOfRelationships: – BibEntity: Dates: – D: 10 M: 04 Text: 4/10/2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 02179849 Numbering: – Type: volume Value: 40 – Type: issue Value: 10 Titles: – TitleFull: Modern Physics Letters B Type: main |
| ResultId | 1 |
