Abstract
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.
| Original language | English |
|---|---|
| Article number | 085014 |
| Journal | AIP Advances |
| Volume | 7 |
| Issue number | 8 |
| DOIs | |
| Publication status | Published - 2017 Aug 1 |
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ASJC Scopus subject areas
- Physics and Astronomy(all)
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Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples. / Suraj, T. S.; Miryala, Muralidhar; Sethupathi, K.; Rao, M. S.Ramachandra; Murakami, Masato.
In: AIP Advances, Vol. 7, No. 8, 085014, 01.08.2017.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples
AU - Suraj, T. S.
AU - Miryala, Muralidhar
AU - Sethupathi, K.
AU - Rao, M. S.Ramachandra
AU - Murakami, Masato
PY - 2017/8/1
Y1 - 2017/8/1
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=85028521951&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85028521951&partnerID=8YFLogxK
U2 - 10.1063/1.5000259
DO - 10.1063/1.5000259
M3 - Article
VL - 7
JO - AIP Advances
JF - AIP Advances
SN - 2158-3226
IS - 8
M1 - 085014
ER -