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 |
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Article number | 085014 |
Journal | AIP Advances |
Volume | 7 |
Issue number | 8 |
DOIs | |
Publication status | Published - 2017 Aug 1 |
ASJC Scopus subject areas
- Physics and Astronomy(all)