Evolution of structural, magnetic, electrical, and thermal studies of R0.7Sr0.3CoO3 (R = La, Pr, Nd) cobaltites.
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| Title: | Evolution of structural, magnetic, electrical, and thermal studies of R |
|---|---|
| Authors: | Joshi, Prachi1 (AUTHOR) joshiprachi2102@gmail.com, Modi, Anchit2 (AUTHOR), Kapoor, Shivani K.1 (AUTHOR), Mishra, Ashutosh1 (AUTHOR) |
| Source: | Applied Physics A: Materials Science & Processing. Dec2025, Vol. 131 Issue 12, p1-9. 9p. |
| Subjects: | Magnetic properties, Electric properties, Thermal properties, Materials science, Cobalt, Perovskite, Mechanical behavior of materials |
| Abstract: | A comprehensive study on R0.7Sr0.3CoO3 (R = La, Pr, Nd) perovskite cobaltites was conducted to investigate the influence of the A-site ionic radius on their structural, magnetic, electrical, and thermoelectric properties. XRD analysis confirmed a phase transition from rhombohedral (La) to orthorhombic (Pr, Nd) structures with decreasing R3+ radius. Scanning electron microscopy (SEM) revealed a reduction in grain size (~ 5 μm) and porosity with decreasing R³⁺ ionic radius, indicating enhanced grain boundary scattering and degradation in electrical conductivity and mechanical integrity. Electrical resistivity exhibited semiconducting behavior governed by small polaron hopping and variable-range hopping mechanisms, increasing resistivity and activation energy across the series. Magnetization measurements revealed a paramagnetic to ferromagnetic transition, with a Curie temperature that decreased from 224 K to 145 K, which was linked to weakened Co3+-O-Co4+ interactions and increased structural distortion. Thermopower results indicated p-type conduction, with Seebeck coefficients increasing as R3+ ionic size decreased and sign reversals suggesting multiband transport. These findings underline the critical role of A-site engineering in tuning the multifunctional behavior of cobaltites. [ABSTRACT FROM AUTHOR] |
| Copyright of Applied Physics A: Materials Science & Processing 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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| Header | DbId: egs DbLabel: Engineering Source An: 190380703 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Evolution of structural, magnetic, electrical, and thermal studies of R<subscript>0.7</subscript>Sr<subscript>0.3</subscript>CoO<subscript>3</subscript> (R = La, Pr, Nd) cobaltites. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Joshi%2C+Prachi%22">Joshi, Prachi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> joshiprachi2102@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Modi%2C+Anchit%22">Modi, Anchit</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kapoor%2C+Shivani+K%2E%22">Kapoor, Shivani K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mishra%2C+Ashutosh%22">Mishra, Ashutosh</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Applied+Physics+A%3A+Materials+Science+%26+Processing%22">Applied Physics A: Materials Science & Processing</searchLink>. Dec2025, Vol. 131 Issue 12, p1-9. 9p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetic+properties%22">Magnetic properties</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+properties%22">Electric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Thermal+properties%22">Thermal properties</searchLink><br /><searchLink fieldCode="DE" term="%22Materials+science%22">Materials science</searchLink><br /><searchLink fieldCode="DE" term="%22Cobalt%22">Cobalt</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+behavior+of+materials%22">Mechanical behavior of materials</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: A comprehensive study on R0.7Sr0.3CoO3 (R = La, Pr, Nd) perovskite cobaltites was conducted to investigate the influence of the A-site ionic radius on their structural, magnetic, electrical, and thermoelectric properties. XRD analysis confirmed a phase transition from rhombohedral (La) to orthorhombic (Pr, Nd) structures with decreasing R3+ radius. Scanning electron microscopy (SEM) revealed a reduction in grain size (~ 5 μm) and porosity with decreasing R³⁺ ionic radius, indicating enhanced grain boundary scattering and degradation in electrical conductivity and mechanical integrity. Electrical resistivity exhibited semiconducting behavior governed by small polaron hopping and variable-range hopping mechanisms, increasing resistivity and activation energy across the series. Magnetization measurements revealed a paramagnetic to ferromagnetic transition, with a Curie temperature that decreased from 224 K to 145 K, which was linked to weakened Co3+-O-Co4+ interactions and increased structural distortion. Thermopower results indicated p-type conduction, with Seebeck coefficients increasing as R3+ ionic size decreased and sign reversals suggesting multiband transport. These findings underline the critical role of A-site engineering in tuning the multifunctional behavior of cobaltites. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Applied Physics A: Materials Science & Processing 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/s00339-025-09110-9 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 9 StartPage: 1 Subjects: – SubjectFull: Magnetic properties Type: general – SubjectFull: Electric properties Type: general – SubjectFull: Thermal properties Type: general – SubjectFull: Materials science Type: general – SubjectFull: Cobalt Type: general – SubjectFull: Perovskite Type: general – SubjectFull: Mechanical behavior of materials Type: general Titles: – TitleFull: Evolution of structural, magnetic, electrical, and thermal studies of R0.7Sr0.3CoO3 (R = La, Pr, Nd) cobaltites. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Joshi, Prachi – PersonEntity: Name: NameFull: Modi, Anchit – PersonEntity: Name: NameFull: Kapoor, Shivani K. – PersonEntity: Name: NameFull: Mishra, Ashutosh IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 12 Text: Dec2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 09478396 Numbering: – Type: volume Value: 131 – Type: issue Value: 12 Titles: – TitleFull: Applied Physics A: Materials Science & Processing Type: main |
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