Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples
We report Rapid Thermal Quenching (RTQ) studies on MgB2 samples from optimized sintering temperature of 800 °C down to liquid nitrogen temperature with different sintering duration. Superior electron-phonon coupling strength (λe−E2g), critical current density (Jc) and irreversibility fields (Hirr) c...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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AIP Publishing LLC
2017-08-01
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| Series: | AIP Advances |
| Online Access: | http://dx.doi.org/10.1063/1.5000259 |
| _version_ | 1828494872174133248 |
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| author | T. S. Suraj M. Muralidhar K. Sethupathi M. S. Ramachandra Rao M. Murakami |
| author_facet | T. S. Suraj M. Muralidhar K. Sethupathi M. S. Ramachandra Rao M. Murakami |
| author_sort | T. S. Suraj |
| collection | DOAJ |
| description | We report Rapid Thermal Quenching (RTQ) studies on MgB2 samples from optimized sintering temperature of 800 °C down to liquid nitrogen temperature with different sintering duration. Superior electron-phonon coupling strength (λe−E2g), critical current density (Jc) and irreversibility fields (Hirr) compared to doped MgB2 were observed without compromising transition temperature Tc. Structural studies showed a contraction of the unit cell due to thermal stress induced by RTQ. Enhanced λe−E2g evaluated from line width, and phonon frequency of Raman spectra using Allen equation was consistent with structural and magnetic studies. Microstructural analysis showed a decrease in grain size resulting in increased Jc and Hirr. |
| first_indexed | 2024-12-11T12:03:32Z |
| format | Article |
| id | doaj.art-d2ec1d0b0cee4ccd9c2344951af5e662 |
| institution | Directory Open Access Journal |
| issn | 2158-3226 |
| language | English |
| last_indexed | 2024-12-11T12:03:32Z |
| publishDate | 2017-08-01 |
| publisher | AIP Publishing LLC |
| record_format | Article |
| series | AIP Advances |
| spelling | doaj.art-d2ec1d0b0cee4ccd9c2344951af5e6622022-12-22T01:08:00ZengAIP Publishing LLCAIP Advances2158-32262017-08-0178085014085014-810.1063/1.5000259051708ADVEnhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samplesT. S. Suraj0M. Muralidhar1K. Sethupathi2M. S. Ramachandra Rao3M. Murakami4Department of Physics, Nano Functional Materials Technology Centre and Materials Science Research Centre, Indian Institute of Technology Madras, Chennai 600036, IndiaSuperconducting Materials Laboratory, Graduate School of Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, JapanDepartment of Physics, Low Temperature Physics Laboratory, Indian Institute of Technology Madras, Chennai 600036, IndiaDepartment of Physics, Nano Functional Materials Technology Centre and Materials Science Research Centre, Indian Institute of Technology Madras, Chennai 600036, IndiaSuperconducting Materials Laboratory, Graduate School of Science and Engineering, Shibaura Institute of Technology, Tokyo 135-8548, JapanWe report Rapid Thermal Quenching (RTQ) studies on MgB2 samples from optimized sintering temperature of 800 °C down to liquid nitrogen temperature with different sintering duration. Superior electron-phonon coupling strength (λe−E2g), critical current density (Jc) and irreversibility fields (Hirr) compared to doped MgB2 were observed without compromising transition temperature Tc. Structural studies showed a contraction of the unit cell due to thermal stress induced by RTQ. Enhanced λe−E2g evaluated from line width, and phonon frequency of Raman spectra using Allen equation was consistent with structural and magnetic studies. Microstructural analysis showed a decrease in grain size resulting in increased Jc and Hirr.http://dx.doi.org/10.1063/1.5000259 |
| spellingShingle | T. S. Suraj M. Muralidhar K. Sethupathi M. S. Ramachandra Rao M. Murakami Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples AIP Advances |
| title | Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples |
| title_full | Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples |
| title_fullStr | Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples |
| title_full_unstemmed | Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples |
| title_short | Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples |
| title_sort | enhanced electron phonon coupling and critical current density in rapid thermally quenched mgb2 bulk samples |
| url | http://dx.doi.org/10.1063/1.5000259 |
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