Awana, V. P. S. and Kumar, Anuj and Jha, Rajveer and Singh, Shiva Kumar and Pal, Anand and -, Shruti and Saha, J. and Patnaik, S. (2013) Appearance of superconductivity in layered LaO0.5F0.5BiS2. Solid State Communications, 157. 21-23. ISSN 0038-1098

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Abstract

Phase pure samples of LaOBiS2 and LaO0.5F0.5BiS2 are synthesized by conventional solid state reaction route via vacuum encapsulation technique at 800 degrees C for 12 h. Both the samples are crystallized in tetragonal P4/nmm space group with lattice parameters a=4.066(1) angstrom, c=13.862(4) angstrom for LaOBiS2; a=4.069(5) angstrom, c=13.366(2) angstrom for LaO0.5F0.5BiS2. Bulk superconductivity is confirmed in LaO0.5F0.5BiS2 with superconducting transition temperature (T-c) of 2.7 K by DC magnetization and resistivity measurements. The isothermal magnetization (M-H) measurement shows closed loops with clear signatures of flux pinning and irreversible behavior. The magneto-transport rho(T,H) measurements show resistive broadening and decrease in T-c(rho= 0) to the lower temperature with increasing magnetic field. The magnetic phase diagram involving upper critical and irreversibility fields as a function of temperature has been ascertained. The upper critical field H-c2(0) is estimated to be similar to 19 kOe corresponding to a Ginzburg-Landau coherence length of similar to 130 angstrom.

Item Type:	Article
Additional Information:	copyright for this article belongs to M/s Elsevier
Subjects:	Applied Physics/Condensed Matter
Divisions:	UNSPECIFIED
Depositing User:	Users 27 not found.
Date Deposited:	19 Aug 2026 10:42
Last Modified:	19 Aug 2026 10:42
URI:	https://npl.csircentral.net/id/eprint/3340

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