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High-pressure studies of superconductivity in BiO$_{0.75}$F$_{0.25}$BiS$_2$
ZEBA HAQUE GOHIL S THAKUR GANESAN KALAI SELVAN SONACHALAM ARUMUGAM L C GUPTA A K GANGULI
Volume 40 Issue 6 October 2017 pp 1121-1125
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Keywords
Superconductivity ;crystal structure ;resistivity ;high pressure magnetism. -
Abstract
BiO$_{0.75}$F$_{0.25}$BiS$_2$ crystallizes in tetragonal CeOBiS$_2$ structure (S. G. P4/nmm). We have investigated the effect of pressure on magnetization measurements. Our studies suggest improved superconducting properties in polycrystalline samples of BiO$_{0.75}$F$_{0.25}$BiS$_2$. The Tc in our sample is 5.3 K, at ambient pressure, which is marginal but definite enhancementover $T_c$ reported earlier ($=$5.1 K). The upper critical field Hc2(0) is greater than 3 T, which is higher than earlier report onthis material. As determined from the M–H curve, both H$_{c2}$ and H$_{c1}$ decrease under external pressure $P$ ($0 \leq P \leq 1$ GPa). We observe a decrease in critical current density and transition temperature on applying pressure in BiO$_{0.75}$F$_{0.25}$BiS$_2$.
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Author Affiliations
ZEBA HAQUE1 GOHIL S THAKUR1 2 GANESAN KALAI SELVAN3 SONACHALAM ARUMUGAM3 L C GUPTA1 4 A K GANGULI1 5
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
- Present address: Max Planck Institute for Chemical Physics of Solids, Dresden 01189, Germany
- Centre for High Pressure Research, School of Physics, Bharathidasan University, Tiruchirappalli 620024, India
- Solid State and Nano Research Laboratory, Department of Chemistry, IIT Delhi, New Delhi 110016, India
- Institute of Nano Science and Technology, Habitat Centre, Mohali, Punjab 160062, India
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Dates
- Published
- 15 October 2017
- Manuscript received
- 15 September 2016
- Accepted
- 7 March 2017
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