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Influences of Pb Substitution on Microstructure, Electrical Transport, and Mechanical Properties of Single-Crystal FeTe0.5Se0.5 Superconductors.

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Title: Influences of Pb Substitution on Microstructure, Electrical Transport, and Mechanical Properties of Single-Crystal FeTe0.5Se0.5 Superconductors.
Authors: Yakinci, K.1 (AUTHOR) kubra.yakinci@yahoo.com, Turkoglu, F.2 (AUTHOR), Koseoglu, H.3 (AUTHOR), Yilmaz, F.4 (AUTHOR), Yakinci, M. E.2 (AUTHOR)
Source: Journal of Superconductivity & Novel Magnetism. Sep2022, Vol. 35 Issue 9, p2247-2257. 11p.
Subjects: Superconductors, Microstructure, Superconductivity, Elastic modulus, Single crystals, Iron-based superconductors, Flux pinning
Abstract: In this work, single crystals of superconducting Fe1-xPbxTe0.5Se0.5 (x = 0.0, 0.01, 0.05, and 0.1) were grown by self-flux method. The structural, electrical, and mechanical properties of prepared samples were investigated. Structurally, it was determined that as the Pb ratio increased, the a- parameter of the crystal structure increased and the c-parameter decreased. SEM analysis showed that there was no significant microstructural change in Pb substituted FeSeTe material compared with the unsubstituted sample. There was a growth in the form of single-crystal sheets with thicknesses between 700 nm and 2 μm. It was observed that the Pb substitution was not shown any positive change in the electrical properties compared to the unsubstituted FeSeTe system, and superconductivity deteriorated as the Pb concentration was increased. Similar trends were obtained both for the upper critical field, Hc2(T), and a characteristic length, ξc. Relation between the mechanical properties and substitution ratio was also investigated. The hardness profiles value was found in the range of 0.90–0.49 GPa, while the elastic modulus was obtained between 19.4 and 7.84 GPa depending on the Pb substitution. It was seen that these values were slightly lower than the results obtained for unsubstituted FeSeTe material. This shows that Pb substitution has an effect on the elasticity of FeSeTe material. [ABSTRACT FROM AUTHOR]
Copyright of Journal of Superconductivity & Novel Magnetism 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: Influences of Pb Substitution on Microstructure, Electrical Transport, and Mechanical Properties of Single-Crystal FeTe<subscript>0.5</subscript>Se<subscript>0.5</subscript> Superconductors.
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  Data: <searchLink fieldCode="AR" term="%22Yakinci%2C+K%2E%22">Yakinci, K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> kubra.yakinci@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Turkoglu%2C+F%2E%22">Turkoglu, F.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Koseoglu%2C+H%2E%22">Koseoglu, H.</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yilmaz%2C+F%2E%22">Yilmaz, F.</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yakinci%2C+M%2E+E%2E%22">Yakinci, M. E.</searchLink><relatesTo>2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Journal+of+Superconductivity+%26+Novel+Magnetism%22">Journal of Superconductivity & Novel Magnetism</searchLink>. Sep2022, Vol. 35 Issue 9, p2247-2257. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Superconductors%22">Superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Microstructure%22">Microstructure</searchLink><br /><searchLink fieldCode="DE" term="%22Superconductivity%22">Superconductivity</searchLink><br /><searchLink fieldCode="DE" term="%22Elastic+modulus%22">Elastic modulus</searchLink><br /><searchLink fieldCode="DE" term="%22Single+crystals%22">Single crystals</searchLink><br /><searchLink fieldCode="DE" term="%22Iron-based+superconductors%22">Iron-based superconductors</searchLink><br /><searchLink fieldCode="DE" term="%22Flux+pinning%22">Flux pinning</searchLink>
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  Label: Abstract
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  Data: In this work, single crystals of superconducting Fe1-xPbxTe0.5Se0.5 (x = 0.0, 0.01, 0.05, and 0.1) were grown by self-flux method. The structural, electrical, and mechanical properties of prepared samples were investigated. Structurally, it was determined that as the Pb ratio increased, the a- parameter of the crystal structure increased and the c-parameter decreased. SEM analysis showed that there was no significant microstructural change in Pb substituted FeSeTe material compared with the unsubstituted sample. There was a growth in the form of single-crystal sheets with thicknesses between 700 nm and 2 μm. It was observed that the Pb substitution was not shown any positive change in the electrical properties compared to the unsubstituted FeSeTe system, and superconductivity deteriorated as the Pb concentration was increased. Similar trends were obtained both for the upper critical field, Hc2(T), and a characteristic length, ξc. Relation between the mechanical properties and substitution ratio was also investigated. The hardness profiles value was found in the range of 0.90–0.49 GPa, while the elastic modulus was obtained between 19.4 and 7.84 GPa depending on the Pb substitution. It was seen that these values were slightly lower than the results obtained for unsubstituted FeSeTe material. This shows that Pb substitution has an effect on the elasticity of FeSeTe material. [ABSTRACT FROM AUTHOR]
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  Label:
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  Data: <i>Copyright of Journal of Superconductivity & Novel Magnetism 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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        Value: 10.1007/s10948-022-06200-0
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        Text: English
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        PageCount: 11
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        Type: general
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      – SubjectFull: Superconductivity
        Type: general
      – SubjectFull: Elastic modulus
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      – SubjectFull: Single crystals
        Type: general
      – SubjectFull: Iron-based superconductors
        Type: general
      – SubjectFull: Flux pinning
        Type: general
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      – TitleFull: Influences of Pb Substitution on Microstructure, Electrical Transport, and Mechanical Properties of Single-Crystal FeTe0.5Se0.5 Superconductors.
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              M: 09
              Text: Sep2022
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