Electrical and Dielectric Properties of Sr-Doped LaCuO4 Perovskites: Structural Insights and Applications in High-Frequency Electronics and Energy Storage.
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| Title: | Electrical and Dielectric Properties of Sr-Doped LaCuO |
|---|---|
| Authors: | Aldosari, F. M.1 (AUTHOR), Ismail, Atef2 (AUTHOR), Shaaban, E. R.2 (AUTHOR) essamhasanien.42@azhar.edu.eg |
| Source: | Journal of Inorganic & Organometallic Polymers & Materials. Sep2025, Vol. 35 Issue 9, p7876-7886. 11p. |
| Subjects: | Electric properties, Dielectric properties, Structural analysis (Science), Energy storage, Perovskite, Magnetic measurements, Microwave devices |
| Abstract: | In this study, La cations were replaced by Sr cations in La(1−x)SrxCuO4 perovskite structures where x = 0, 0.25, 0.5 at.%. The prepared samples were characterized using energy dispersive X-ray (EDAX), X-ray diffraction (XRD), electrical and magnetic measurements. EDAX plots showed the replacement of La by Sr, with the Sr peaks increasing while the La peaks decreasing, with increasing x. XRD patterns revealed changes in the crystallization peaks with the replacement of Sr by La. XRD analysis resulted in a phase transition from orthorhombic to tetragonal, indicating the formation of nanocrystals as well as an increase in lattice strain. Electrical measurements showed that strontium cations act as structural defects that trap charge carriers, reducing the electrical conductivity, especially at low frequencies. All samples exhibited thermally active conductivity, with lower activation energies at higher temperatures, reflecting semiconductor behavior. Increasing the strontium content resulted in lower power dissipation at higher frequencies, indicating that the prepared samples act as an efficient energy storage for high-frequency applications. The introduction of Sr increased both the activation energy and the characteristic relaxation time from 0.3 to 0.41 eV and from 3.08E−12 to 3.87E−11 s, respectively. The magnetic measurements, at RT, indicates that La2−xSrxCuO4 perovskites exhibit paramagnetic behavior due to unpaired electrons in copper or lanthanide cations. Where the sample of Sr (0.25) showed the maximum saturation magnetization (Ms) and remanent magnetization (Mr). Compared to CoFeO4, LaSrCuO4 has low saturation magnetization but high remanence and coercivity, making it valuable in superconductivity and other applications. The balance between charge compensation, oxygen vacancies, and exchange interactions shapes the material's magnetic behavior. [ABSTRACT FROM AUTHOR] |
| Copyright of Journal of Inorganic & Organometallic Polymers & Materials is the property of Springer Nature 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.) | |
| Database: | Engineering Source |
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| Items | – Name: Title Label: Title Group: Ti Data: Electrical and Dielectric Properties of Sr-Doped LaCuO<subscript>4</subscript> Perovskites: Structural Insights and Applications in High-Frequency Electronics and Energy Storage. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Aldosari%2C+F%2E+M%2E%22">Aldosari, F. M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Ismail%2C+Atef%22">Ismail, Atef</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Shaaban%2C+E%2E+R%2E%22">Shaaban, E. R.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<i> essamhasanien.42@azhar.edu.eg</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Journal+of+Inorganic+%26+Organometallic+Polymers+%26+Materials%22">Journal of Inorganic & Organometallic Polymers & Materials</searchLink>. Sep2025, Vol. 35 Issue 9, p7876-7886. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Electric+properties%22">Electric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectric+properties%22">Dielectric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Structural+analysis+%28Science%29%22">Structural analysis (Science)</searchLink><br /><searchLink fieldCode="DE" term="%22Energy+storage%22">Energy storage</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+measurements%22">Magnetic measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Microwave+devices%22">Microwave devices</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this study, La cations were replaced by Sr cations in La(1−x)SrxCuO4 perovskite structures where x = 0, 0.25, 0.5 at.%. The prepared samples were characterized using energy dispersive X-ray (EDAX), X-ray diffraction (XRD), electrical and magnetic measurements. EDAX plots showed the replacement of La by Sr, with the Sr peaks increasing while the La peaks decreasing, with increasing x. XRD patterns revealed changes in the crystallization peaks with the replacement of Sr by La. XRD analysis resulted in a phase transition from orthorhombic to tetragonal, indicating the formation of nanocrystals as well as an increase in lattice strain. Electrical measurements showed that strontium cations act as structural defects that trap charge carriers, reducing the electrical conductivity, especially at low frequencies. All samples exhibited thermally active conductivity, with lower activation energies at higher temperatures, reflecting semiconductor behavior. Increasing the strontium content resulted in lower power dissipation at higher frequencies, indicating that the prepared samples act as an efficient energy storage for high-frequency applications. The introduction of Sr increased both the activation energy and the characteristic relaxation time from 0.3 to 0.41 eV and from 3.08E−12 to 3.87E−11 s, respectively. The magnetic measurements, at RT, indicates that La2−xSrxCuO4 perovskites exhibit paramagnetic behavior due to unpaired electrons in copper or lanthanide cations. Where the sample of Sr (0.25) showed the maximum saturation magnetization (Ms) and remanent magnetization (Mr). Compared to CoFeO4, LaSrCuO4 has low saturation magnetization but high remanence and coercivity, making it valuable in superconductivity and other applications. The balance between charge compensation, oxygen vacancies, and exchange interactions shapes the material's magnetic behavior. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Journal of Inorganic & Organometallic Polymers & Materials is the property of Springer Nature 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: 10.1007/s10904-025-03719-2 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 7876 Subjects: – SubjectFull: Electric properties Type: general – SubjectFull: Dielectric properties Type: general – SubjectFull: Structural analysis (Science) Type: general – SubjectFull: Energy storage Type: general – SubjectFull: Perovskite Type: general – SubjectFull: Magnetic measurements Type: general – SubjectFull: Microwave devices Type: general Titles: – TitleFull: Electrical and Dielectric Properties of Sr-Doped LaCuO4 Perovskites: Structural Insights and Applications in High-Frequency Electronics and Energy Storage. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Aldosari, F. M. – PersonEntity: Name: NameFull: Ismail, Atef – PersonEntity: Name: NameFull: Shaaban, E. R. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 09 Text: Sep2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 15741443 Numbering: – Type: volume Value: 35 – Type: issue Value: 9 Titles: – TitleFull: Journal of Inorganic & Organometallic Polymers & Materials Type: main |
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