Appearance of superconductivity in layered LaO0.5F 0.5BiS2

V. P.S. Awana; Anuj Kumar; Rajveer Jha; Shiva Kumar Singh; Anand Pal; Shruti; J. Saha; S. Patnaik

doi:10.1016/j.ssc.2012.11.021

Appearance of superconductivity in layered LaO_0.5F _0.5BiS₂

V. P.S. Awana^*, Anuj Kumar, Rajveer Jha, Shiva Kumar Singh, Anand Pal, Shruti, J. Saha, S. Patnaik

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

103 Citations (Scopus)

Abstract

Phase pure samples of LaOBiS₂ and LaO_0.5F _0.5BiS₂ are synthesized by conventional solid state reaction route via vacuum encapsulation technique at 800 °C for 12 h. Both the samples are crystallized in tetragonal P4/nmm space group with lattice parameters a=4.066(1) Å, c=13.862(4) Å for LaOBiS₂; a=4.069(5) Å, c=13.366(2) Å for LaO_0.5F _0.5BiS₂. Bulk superconductivity is confirmed in LaO _0.5F_0.5BiS₂ 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 ρ(T,H) measurements show resistive broadening and decrease in T_c (ρ=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 ∼19 kOe corresponding to a Ginzburg-Landau coherence length of ∼130 Å.

Original language	English
Pages (from-to)	21-23
Number of pages	3
Journal	Solid State Communications
Volume	157
DOIs	https://doi.org/10.1016/j.ssc.2012.11.021
Publication status	Published - 03-2013

All Science Journal Classification (ASJC) codes

General Chemistry
Condensed Matter Physics
Materials Chemistry

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10.1016/j.ssc.2012.11.021

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@article{b4ea49d6718a45029198827d52310d6e,

title = "Appearance of superconductivity in layered LaO0.5F 0.5BiS2",

abstract = "Phase pure samples of LaOBiS2 and LaO0.5F 0.5BiS2 are synthesized by conventional solid state reaction route via vacuum encapsulation technique at 800 °C for 12 h. Both the samples are crystallized in tetragonal P4/nmm space group with lattice parameters a=4.066(1) {\AA}, c=13.862(4) {\AA} for LaOBiS2; a=4.069(5) {\AA}, c=13.366(2) {\AA} for LaO0.5F 0.5BiS2. Bulk superconductivity is confirmed in LaO 0.5F0.5BiS2 with superconducting transition temperature (Tc) 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 ρ(T,H) measurements show resistive broadening and decrease in Tc (ρ=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 Hc2(0) is estimated to be ∼19 kOe corresponding to a Ginzburg-Landau coherence length of ∼130 {\AA}.",

author = "Awana, \{V. P.S.\} and Anuj Kumar and Rajveer Jha and \{Kumar Singh\}, Shiva and Anand Pal and Shruti and J. Saha and S. Patnaik",

note = "Funding Information: Authors from NPL would like to thank their Director Prof. R. C. Budhani for his keen interest in the present work. This work is supported by DAE-SRC outstanding investigator award scheme on search for new superconductors. Anuj Kumar, Rajveer Jha, Shiva Kumar and Anand Pal are thankful to CSIR-India for providing the financial support during their research. Shruti and J. Saha acknowledge UGC for research fellowships. S. Patnaik thanks AIRF , JNU for the PPMS facility. ",

year = "2013",

month = mar,

doi = "10.1016/j.ssc.2012.11.021",

language = "English",

volume = "157",

pages = "21--23",

journal = "Solid State Communications",

issn = "0038-1098",

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TY - JOUR

T1 - Appearance of superconductivity in layered LaO0.5F 0.5BiS2

AU - Awana, V. P.S.

AU - Kumar, Anuj

AU - Jha, Rajveer

AU - Kumar Singh, Shiva

AU - Pal, Anand

AU - Shruti,

AU - Saha, J.

AU - Patnaik, S.

N1 - Funding Information: Authors from NPL would like to thank their Director Prof. R. C. Budhani for his keen interest in the present work. This work is supported by DAE-SRC outstanding investigator award scheme on search for new superconductors. Anuj Kumar, Rajveer Jha, Shiva Kumar and Anand Pal are thankful to CSIR-India for providing the financial support during their research. Shruti and J. Saha acknowledge UGC for research fellowships. S. Patnaik thanks AIRF , JNU for the PPMS facility.

PY - 2013/3

Y1 - 2013/3

N2 - Phase pure samples of LaOBiS2 and LaO0.5F 0.5BiS2 are synthesized by conventional solid state reaction route via vacuum encapsulation technique at 800 °C for 12 h. Both the samples are crystallized in tetragonal P4/nmm space group with lattice parameters a=4.066(1) Å, c=13.862(4) Å for LaOBiS2; a=4.069(5) Å, c=13.366(2) Å for LaO0.5F 0.5BiS2. Bulk superconductivity is confirmed in LaO 0.5F0.5BiS2 with superconducting transition temperature (Tc) 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 ρ(T,H) measurements show resistive broadening and decrease in Tc (ρ=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 Hc2(0) is estimated to be ∼19 kOe corresponding to a Ginzburg-Landau coherence length of ∼130 Å.

AB - Phase pure samples of LaOBiS2 and LaO0.5F 0.5BiS2 are synthesized by conventional solid state reaction route via vacuum encapsulation technique at 800 °C for 12 h. Both the samples are crystallized in tetragonal P4/nmm space group with lattice parameters a=4.066(1) Å, c=13.862(4) Å for LaOBiS2; a=4.069(5) Å, c=13.366(2) Å for LaO0.5F 0.5BiS2. Bulk superconductivity is confirmed in LaO 0.5F0.5BiS2 with superconducting transition temperature (Tc) 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 ρ(T,H) measurements show resistive broadening and decrease in Tc (ρ=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 Hc2(0) is estimated to be ∼19 kOe corresponding to a Ginzburg-Landau coherence length of ∼130 Å.

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DO - 10.1016/j.ssc.2012.11.021

M3 - Article

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SN - 0038-1098

VL - 157

SP - 21

EP - 23

JO - Solid State Communications

JF - Solid State Communications

ER -

Appearance of superconductivity in layered LaO_0.5F _0.5BiS₂

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