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Title: X-ray Photoelectron Spectroscopy, Magnetotransport and Magnetisation Study of Nb{sub 2}PdS{sub 5} Superconductor

Abstract

In the present report, we investigate various properties of the Nb{sub 2}PdS{sub 5} superconductor. Scanning electron microscopy displayed slabs like laminar growth of Nb{sub 2}PdS{sub 5} while X-ray photoelectron spectroscopy exhibited the hybridisation of sulphur (2p) with both palladium (3d) and niobium (3d). High-field (140 kOe) magneto-transport measurements revealed that superconductivity (T{sub c}{sup onset}=7 K and T cρ= 0 = 6.2 K) of the studied Nb{sub 2}PdS{sub 5} material is quite robust against magnetic field with the upper critical field (H{sub c2}) outside the Pauli paramagnetic limit. Thermally activated flux flow (TAFF) of the compound showed that resistivity curves follow Arrhenius behaviour. The activation energy for Nb{sub 2}PdS{sub 5} is found to decrease from 15.15 meV at 10 kOe to 2.35 meV at 140 kOe. Seemingly, the single vortex pinning is dominant in low-field regions, while collective pinning is dominant in high-field region. The temperature dependence of AC susceptibility confirmed the T{sub c} at 6 K, further varying amplitude and frequency, showed well-coupled granular nature of superconductivity. The lower critical field (H{sub c1}) is extracted from DC magnetisation measurements at various T below T{sub c}. It is found that H{sub c1}(T) of Nb{sub 2}PdS{sub 5} material seemingly follows the multiband naturemore » of superconductivity.« less

Authors:
; ; ;  [1];  [2];  [1]
  1. CSIR-National Physical Laboratory (India)
  2. Tokyo Metropolitan University, Department of Physics (Japan)
Publication Date:
OSTI Identifier:
22782485
Resource Type:
Journal Article
Journal Name:
Journal of Superconductivity and Novel Magnetism
Additional Journal Information:
Journal Volume: 31; Journal Issue: 4; Other Information: Copyright (c) 2018 Springer Science+Business Media, LLC, part of Springer Nature; http://www.springer-ny.com; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1557-1939
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ACTIVATION ENERGY; CRITICAL FIELD; MAGNETIZATION; MAGNETORESISTANCE; NIOBIUM COMPOUNDS; PARAMAGNETISM; PRASEODYMIUM COMPOUNDS; SCANNING ELECTRON MICROSCOPY; SOLIDS; SULFUR COMPOUNDS; SUPERCONDUCTIVITY; SUPERCONDUCTORS; SYNTHESIS; TEMPERATURE DEPENDENCE; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Goyal, Reena, Srivastava, A. K., Mishra, Monu, Gupta, Govind, Jha, Rajveer, and Awana, V. P. S.,. X-ray Photoelectron Spectroscopy, Magnetotransport and Magnetisation Study of Nb{sub 2}PdS{sub 5} Superconductor. United States: N. p., 2018. Web. doi:10.1007/S10948-017-4415-8.
Goyal, Reena, Srivastava, A. K., Mishra, Monu, Gupta, Govind, Jha, Rajveer, & Awana, V. P. S.,. X-ray Photoelectron Spectroscopy, Magnetotransport and Magnetisation Study of Nb{sub 2}PdS{sub 5} Superconductor. United States. doi:10.1007/S10948-017-4415-8.
Goyal, Reena, Srivastava, A. K., Mishra, Monu, Gupta, Govind, Jha, Rajveer, and Awana, V. P. S.,. Sun . "X-ray Photoelectron Spectroscopy, Magnetotransport and Magnetisation Study of Nb{sub 2}PdS{sub 5} Superconductor". United States. doi:10.1007/S10948-017-4415-8.
@article{osti_22782485,
title = {X-ray Photoelectron Spectroscopy, Magnetotransport and Magnetisation Study of Nb{sub 2}PdS{sub 5} Superconductor},
author = {Goyal, Reena and Srivastava, A. K. and Mishra, Monu and Gupta, Govind and Jha, Rajveer and Awana, V. P. S.,},
abstractNote = {In the present report, we investigate various properties of the Nb{sub 2}PdS{sub 5} superconductor. Scanning electron microscopy displayed slabs like laminar growth of Nb{sub 2}PdS{sub 5} while X-ray photoelectron spectroscopy exhibited the hybridisation of sulphur (2p) with both palladium (3d) and niobium (3d). High-field (140 kOe) magneto-transport measurements revealed that superconductivity (T{sub c}{sup onset}=7 K and T cρ= 0 = 6.2 K) of the studied Nb{sub 2}PdS{sub 5} material is quite robust against magnetic field with the upper critical field (H{sub c2}) outside the Pauli paramagnetic limit. Thermally activated flux flow (TAFF) of the compound showed that resistivity curves follow Arrhenius behaviour. The activation energy for Nb{sub 2}PdS{sub 5} is found to decrease from 15.15 meV at 10 kOe to 2.35 meV at 140 kOe. Seemingly, the single vortex pinning is dominant in low-field regions, while collective pinning is dominant in high-field region. The temperature dependence of AC susceptibility confirmed the T{sub c} at 6 K, further varying amplitude and frequency, showed well-coupled granular nature of superconductivity. The lower critical field (H{sub c1}) is extracted from DC magnetisation measurements at various T below T{sub c}. It is found that H{sub c1}(T) of Nb{sub 2}PdS{sub 5} material seemingly follows the multiband nature of superconductivity.},
doi = {10.1007/S10948-017-4415-8},
journal = {Journal of Superconductivity and Novel Magnetism},
issn = {1557-1939},
number = 4,
volume = 31,
place = {United States},
year = {2018},
month = {4}
}