Fragmented ferromagnetic-phase and evolution of Re-entrant cluster-glass behavior in La0.6Sr0.4Co1-xAlxO3 (0 ≤ x ≤ 0.15) compounds.
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| Title: | Fragmented ferromagnetic-phase and evolution of Re-entrant cluster-glass behavior in La0.6Sr0.4Co1-xAlxO3 (0 ≤ x ≤ 0.15) compounds. |
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| Authors: | Pandey, Devendra K.1,2 (AUTHOR) Devendra.Kumar.Pandey@physics.iitd.ac.in, Modi, Anchit2 (AUTHOR), Gaur, Neeraj K.2 (AUTHOR) |
| Source: | Ceramics International. Feb2023, Vol. 49 Issue 3, p5217-5227. 11p. |
| Subjects: | Magnetic measurements, Soft X rays, Magnetic moments, X-ray absorption, X-ray diffraction, Space groups |
| Abstract: | We have observed the fragmentation of ferromagnetic-phase with Al3+ substitution in polycrystalline La 0.6 Sr 0.4 Co 1-x Al x O 3 (0 ≤ x ≤ 0.15) perovskite compounds. The introduction of non-magnetic Al3+ ions at the Co3+ sites results in several segregated ferromagnetic domains that interact and demonstrate cluster-glass-like behavior. The structural information and phase purity is determined with X-ray diffraction and Rietveld-refinement. The compounds crystallize in the R-3c space group with some iso-structural distortions. The soft X-ray absorption spectroscopy (SXAS) of cobalt L 2,3 -edges revealed the heterogeneous electronic phase with a majority of Co3+ ions. The spin-only contribution of Co3+ and Co4+ to the net-effective magnetic moment confirms the presence of High-spin Co3+ (S = 2) and Low-spin Co4+ (S = 1/2) ionic species. The magnetization parameters (θ p , T c , T b , C, and μ eff) observed from the (FC-ZFC) dc-magnetization measurements were suppressed with increasing Al3+ concentration. Inhomogeneous magnetic-phase transition is observed due to segregation in the ferromagnetic phase. Hence, in the parent compound, the intrinsic-ferromagnetism weakens with Al3+ substitution. Therefore, the long-range ferromagnetic-ordering fragments into several interacting FM clusters are isolated by a coexisting non-ferromagnetic (Al3+ rich) sub-lattice. The frequency-dependent magnetic ac-susceptibility measurements determine a re-entrant cluster-glass nature which is analyzed with the Mydosh parameter (φ), Critical-Slowing-down of spins, and Vogel-Fulcher-formulation. [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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| Items | – Name: Title Label: Title Group: Ti Data: Fragmented ferromagnetic-phase and evolution of Re-entrant cluster-glass behavior in La0.6Sr0.4Co1-xAlxO3 (0 ≤ x ≤ 0.15) compounds. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Pandey%2C+Devendra+K%2E%22">Pandey, Devendra K.</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> Devendra.Kumar.Pandey@physics.iitd.ac.in</i><br /><searchLink fieldCode="AR" term="%22Modi%2C+Anchit%22">Modi, Anchit</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Gaur%2C+Neeraj+K%2E%22">Gaur, Neeraj K.</searchLink><relatesTo>2</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Feb2023, Vol. 49 Issue 3, p5217-5227. 11p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetic+measurements%22">Magnetic measurements</searchLink><br /><searchLink fieldCode="DE" term="%22Soft+X+rays%22">Soft X rays</searchLink><br /><searchLink fieldCode="DE" term="%22Magnetic+moments%22">Magnetic moments</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+absorption%22">X-ray absorption</searchLink><br /><searchLink fieldCode="DE" term="%22X-ray+diffraction%22">X-ray diffraction</searchLink><br /><searchLink fieldCode="DE" term="%22Space+groups%22">Space groups</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: We have observed the fragmentation of ferromagnetic-phase with Al3+ substitution in polycrystalline La 0.6 Sr 0.4 Co 1-x Al x O 3 (0 ≤ x ≤ 0.15) perovskite compounds. The introduction of non-magnetic Al3+ ions at the Co3+ sites results in several segregated ferromagnetic domains that interact and demonstrate cluster-glass-like behavior. The structural information and phase purity is determined with X-ray diffraction and Rietveld-refinement. The compounds crystallize in the R-3c space group with some iso-structural distortions. The soft X-ray absorption spectroscopy (SXAS) of cobalt L 2,3 -edges revealed the heterogeneous electronic phase with a majority of Co3+ ions. The spin-only contribution of Co3+ and Co4+ to the net-effective magnetic moment confirms the presence of High-spin Co3+ (S = 2) and Low-spin Co4+ (S = 1/2) ionic species. The magnetization parameters (θ p , T c , T b , C, and μ eff) observed from the (FC-ZFC) dc-magnetization measurements were suppressed with increasing Al3+ concentration. Inhomogeneous magnetic-phase transition is observed due to segregation in the ferromagnetic phase. Hence, in the parent compound, the intrinsic-ferromagnetism weakens with Al3+ substitution. Therefore, the long-range ferromagnetic-ordering fragments into several interacting FM clusters are isolated by a coexisting non-ferromagnetic (Al3+ rich) sub-lattice. The frequency-dependent magnetic ac-susceptibility measurements determine a re-entrant cluster-glass nature which is analyzed with the Mydosh parameter (φ), Critical-Slowing-down of spins, and Vogel-Fulcher-formulation. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab 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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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ceramint.2022.10.040 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 11 StartPage: 5217 Subjects: – SubjectFull: Magnetic measurements Type: general – SubjectFull: Soft X rays Type: general – SubjectFull: Magnetic moments Type: general – SubjectFull: X-ray absorption Type: general – SubjectFull: X-ray diffraction Type: general – SubjectFull: Space groups Type: general Titles: – TitleFull: Fragmented ferromagnetic-phase and evolution of Re-entrant cluster-glass behavior in La0.6Sr0.4Co1-xAlxO3 (0 ≤ x ≤ 0.15) compounds. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Pandey, Devendra K. – PersonEntity: Name: NameFull: Modi, Anchit – PersonEntity: Name: NameFull: Gaur, Neeraj K. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 02728842 Numbering: – Type: volume Value: 49 – Type: issue Value: 3 Titles: – TitleFull: Ceramics International Type: main |
| ResultId | 1 |
