Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples

T. S. Suraj; M. Muralidhar; K. Sethupathi; M. S.Ramachandra Rao; M. Masato

doi:10.1063/1.5000259

Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB₂ bulk samples

T. S. Suraj, M. Muralidhar, K. Sethupathi, M. S.Ramachandra Rao, M. Masato

Research output: Contribution to journal › Article

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 (J_c) and irreversibility fields (H_irr) compared to doped MgB₂ were observed without compromising transition temperature T_c. 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 J_c and H_irr.

Original language	English
Article number	085014
Journal	AIP Advances
Volume	7
Issue number	8
DOIs	https://doi.org/10.1063/1.5000259
Publication status	Published - 2017 Aug 1

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1063/1.5000259

Fingerprint Dive into the research topics of 'Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB<sub>2</sub> bulk samples'. Together they form a unique fingerprint.

Cite this

Suraj, T. S., Muralidhar, M., Sethupathi, K., Rao, M. S. R., & Masato, M. (2017). Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB₂ bulk samples. AIP Advances, 7(8), [085014]. https://doi.org/10.1063/1.5000259

@article{e712961787e54c6cb435cfe2eb9db6ba,

title = "Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples",

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.",

author = "Suraj, {T. S.} and M. Muralidhar and K. Sethupathi and Rao, {M. S.Ramachandra} and M. Masato",

year = "2017",

month = aug,

day = "1",

doi = "10.1063/1.5000259",

language = "English",

volume = "7",

journal = "AIP Advances",

issn = "2158-3226",

publisher = "American Institute of Physics Publising LLC",

number = "8",

}

TY - JOUR

T1 - Enhanced electron-phonon coupling and critical current density in rapid thermally quenched MgB2 bulk samples

AU - Suraj, T. S.

AU - Muralidhar, M.

AU - Sethupathi, K.

AU - Rao, M. S.Ramachandra

AU - Masato, M.

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

AN - SCOPUS:85028521951

VL - 7

JO - AIP Advances

JF - AIP Advances

SN - 2158-3226

IS - 8

M1 - 085014

ER -