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Study of hyperfine interactions in calcium titanate perovskite using TDPAC spectroscopy.

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Title: Study of hyperfine interactions in calcium titanate perovskite using TDPAC spectroscopy.
Authors: Kumar, Ashwani1,2 (AUTHOR) kashwani@barc.gov.in, Sahu, Manjulata2,3 (AUTHOR), Tomar, B. S.2 (AUTHOR)
Source: Journal of Radioanalytical & Nuclear Chemistry. Jun2024, Vol. 333 Issue 6, p2813-2820. 8p.
Subjects: Hyperfine interactions, Calcium, Perovskite, Spectrometry, Electronic structure, Electric fields, Calcium ions, Tantalum
Abstract: Local electronic structure was investigated by observing hyperfine interactions (HFI) in Calcium titanate (CTO) perovskite using time differential perturbed angular correlation (TDPAC) spectroscopy. CTO was synthesized by gel-combustion method and doped with (181Hf/181Ta) TDPAC probe to study chemical environment around probe atom. Study revealed presence of two sites characterized by different quadrupole interaction frequencies, ω1a = 203 (2) and ω1b = 160 (2) Mrad/s, but with similar asymmetry parameters, ηa = 0.47 (0.01) and ηb = 0.47 (0.03). Electric Field Gradient (EFG) calculated from HFI parameters are 3.12 (0.03) and 2.47 (0.03) × 1021 V/m2 for the two sites. Point charge model calculation concluded that the two sites have different EFG and corroborated the variation in EFG between two sites accurately. Plausible reasons for existence of two different HFIs at B-site of CTO perovskite is discussed. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Radioanalytical & Nuclear Chemistry 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.)
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  Data: Study of hyperfine interactions in calcium titanate perovskite using TDPAC spectroscopy.
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  Data: <searchLink fieldCode="AR" term="%22Kumar%2C+Ashwani%22">Kumar, Ashwani</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> kashwani@barc.gov.in</i><br /><searchLink fieldCode="AR" term="%22Sahu%2C+Manjulata%22">Sahu, Manjulata</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Tomar%2C+B%2E+S%2E%22">Tomar, B. S.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Radioanalytical+%26+Nuclear+Chemistry%22">Journal of Radioanalytical & Nuclear Chemistry</searchLink>. Jun2024, Vol. 333 Issue 6, p2813-2820. 8p.
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  Data: <searchLink fieldCode="DE" term="%22Hyperfine+interactions%22">Hyperfine interactions</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium%22">Calcium</searchLink><br /><searchLink fieldCode="DE" term="%22Perovskite%22">Perovskite</searchLink><br /><searchLink fieldCode="DE" term="%22Spectrometry%22">Spectrometry</searchLink><br /><searchLink fieldCode="DE" term="%22Electronic+structure%22">Electronic structure</searchLink><br /><searchLink fieldCode="DE" term="%22Electric+fields%22">Electric fields</searchLink><br /><searchLink fieldCode="DE" term="%22Calcium+ions%22">Calcium ions</searchLink><br /><searchLink fieldCode="DE" term="%22Tantalum%22">Tantalum</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Local electronic structure was investigated by observing hyperfine interactions (HFI) in Calcium titanate (CTO) perovskite using time differential perturbed angular correlation (TDPAC) spectroscopy. CTO was synthesized by gel-combustion method and doped with (181Hf/181Ta) TDPAC probe to study chemical environment around probe atom. Study revealed presence of two sites characterized by different quadrupole interaction frequencies, ω1a = 203 (2) and ω1b = 160 (2) Mrad/s, but with similar asymmetry parameters, ηa = 0.47 (0.01) and ηb = 0.47 (0.03). Electric Field Gradient (EFG) calculated from HFI parameters are 3.12 (0.03) and 2.47 (0.03) × 1021 V/m2 for the two sites. Point charge model calculation concluded that the two sites have different EFG and corroborated the variation in EFG between two sites accurately. Plausible reasons for existence of two different HFIs at B-site of CTO perovskite is discussed. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Journal of Radioanalytical & Nuclear Chemistry 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:
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    Identifiers:
      – Type: doi
        Value: 10.1007/s10967-024-09441-6
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      – Code: eng
        Text: English
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        PageCount: 8
        StartPage: 2813
    Subjects:
      – SubjectFull: Hyperfine interactions
        Type: general
      – SubjectFull: Calcium
        Type: general
      – SubjectFull: Perovskite
        Type: general
      – SubjectFull: Spectrometry
        Type: general
      – SubjectFull: Electronic structure
        Type: general
      – SubjectFull: Electric fields
        Type: general
      – SubjectFull: Calcium ions
        Type: general
      – SubjectFull: Tantalum
        Type: general
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      – TitleFull: Study of hyperfine interactions in calcium titanate perovskite using TDPAC spectroscopy.
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          Name:
            NameFull: Kumar, Ashwani
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            NameFull: Sahu, Manjulata
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            NameFull: Tomar, B. S.
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            – D: 01
              M: 06
              Text: Jun2024
              Type: published
              Y: 2024
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              Value: 333
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            – TitleFull: Journal of Radioanalytical & Nuclear Chemistry
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