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Synergistic ultra high dielectric permittivity of LiSnFeO4 solid solution for multifunctional high temperature electronics devices.

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Title: Synergistic ultra high dielectric permittivity of LiSnFeO4 solid solution for multifunctional high temperature electronics devices.
Authors: Padhy, Aniket1 (AUTHOR), Nayak, Praveen Priyaranjan2 (AUTHOR), Hota, S.S.2 (AUTHOR), Panda, Debasish2 (AUTHOR), Kumar, Ashish1 (AUTHOR), Mishra, Guru Prasad1 (AUTHOR) gpscmishra.ece@nitrr.ac.in
Source: Ceramics International. Dec2025:Part B, Vol. 51 Issue 30, p64229-64242. 14p.
Subjects: Permittivity, High temperature electronics, Dielectric polarization, Dielectric strength, Impedance spectroscopy, Electric conductivity, Hybrid materials
Abstract: LiSnFeO 4 (LSFO) solid solution is synthesized via a conventional solid-state reaction route to elucidate its structural, dielectric, and transport properties systematically. X-ray diffraction confirmed the formation of a dominant hexagonal phase (space group P 6 3 mc), along with traces of secondary SnO 2. Microstructural analysis revealed uniformly distributed grains, while EDX and FTIR verified compositional homogeneity. Optical measurements indicated an exceptionally narrow indirect bandgap of 0.71 eV, consistent with NIR-active semiconducting behavior. Dielectric studies exhibited strong frequency and temperature dependence, reaching an ultra-high dielectric constant of (∼9 × 105 at 400 °C and 1 kHz), attributed to strong interfacial (Maxwell-Wagner) polarization. AC conductivity followed Jonscher's power law, with a low activation energy (0.196–0.317 eV), confirming a thermally activated hopping mechanism. Impedance and modulus spectroscopy further revealed non-Debye relaxation processes with clear separation of grain and grain-boundary contributions. This synergistic combination of ultra-high dielectric strength, narrow semiconducting bandgap, and high thermal stability underscores LSFO as a promising multifunctional material for next-generation high-temperature electronics, broadband photodetectors, and sustainable energy technologies. [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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DbLabel: Engineering Source
An: 190229895
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  Data: Synergistic ultra high dielectric permittivity of LiSnFeO4 solid solution for multifunctional high temperature electronics devices.
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  Data: <searchLink fieldCode="AR" term="%22Padhy%2C+Aniket%22">Padhy, Aniket</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Nayak%2C+Praveen+Priyaranjan%22">Nayak, Praveen Priyaranjan</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hota%2C+S%2ES%2E%22">Hota, S.S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Panda%2C+Debasish%22">Panda, Debasish</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kumar%2C+Ashish%22">Kumar, Ashish</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mishra%2C+Guru+Prasad%22">Mishra, Guru Prasad</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> gpscmishra.ece@nitrr.ac.in</i>
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  Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Dec2025:Part B, Vol. 51 Issue 30, p64229-64242. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Permittivity%22">Permittivity</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperature+electronics%22">High temperature electronics</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectric+polarization%22">Dielectric polarization</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectric+strength%22">Dielectric strength</searchLink><br /><searchLink fieldCode="DE" term="%22Impedance+spectroscopy%22">Impedance spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+conductivity%22">Electric conductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Hybrid+materials%22">Hybrid materials</searchLink>
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  Data: LiSnFeO 4 (LSFO) solid solution is synthesized via a conventional solid-state reaction route to elucidate its structural, dielectric, and transport properties systematically. X-ray diffraction confirmed the formation of a dominant hexagonal phase (space group P 6 3 mc), along with traces of secondary SnO 2. Microstructural analysis revealed uniformly distributed grains, while EDX and FTIR verified compositional homogeneity. Optical measurements indicated an exceptionally narrow indirect bandgap of 0.71 eV, consistent with NIR-active semiconducting behavior. Dielectric studies exhibited strong frequency and temperature dependence, reaching an ultra-high dielectric constant of (∼9 × 105 at 400 °C and 1 kHz), attributed to strong interfacial (Maxwell-Wagner) polarization. AC conductivity followed Jonscher's power law, with a low activation energy (0.196–0.317 eV), confirming a thermally activated hopping mechanism. Impedance and modulus spectroscopy further revealed non-Debye relaxation processes with clear separation of grain and grain-boundary contributions. This synergistic combination of ultra-high dielectric strength, narrow semiconducting bandgap, and high thermal stability underscores LSFO as a promising multifunctional material for next-generation high-temperature electronics, broadband photodetectors, and sustainable energy technologies. [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:
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        Value: 10.1016/j.ceramint.2025.11.161
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        Text: English
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      – SubjectFull: Dielectric polarization
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      – SubjectFull: Dielectric strength
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      – SubjectFull: Impedance spectroscopy
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      – SubjectFull: Hybrid materials
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              Text: Dec2025:Part B
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              Y: 2025
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