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Title: Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si)

Abstract

Niobium compounds continue to be an interesting family of superconductors, with the recent addition of oxynitrides to it, which can be categorized as low-T{sub c} superconductors (LTS) because they exhibit superconductivity below T{sub c}{approx}17 K. In this paper, we report the superconducting properties of three members of the family of niobium oxynitrides, viz. (Nb{sub 0.89}Al{sub 0.11})(N{sub 0.84}O{sub 0.16}), (Nb{sub 0.95}Mg{sub 0.05})(N{sub 0.92}O{sub 0.08}) and (Nb{sub 0.87}Si{sub 0.09}{open_square}{sub 0.04})(N{sub 0.87}O{sub 0.13}). Low temperature dc and ac magnetization measurements have been performed. In addition, heat capacity has been recorded at low temperature under applied magnetic fields. A detailed analysis of the data is presented. - Graphical abstract: The doped Si oxide accompanied with some amount of cation vacancy in cubic NbN lattice induces relatively large magnetic hysteresis on isothermal hysteresis loops at 5 K of the dc magnetization up to 5 T among the four niobium oxynitrides containing main group elements, Nb{sub 1.00}(N{sub 0.98}O{sub 0.02}); (Nb{sub 0.95}Mg{sub 0.05})(N{sub 0.92}O{sub 0.08}); (Nb{sub 0.89}Al{sub 0.11})(N{sub 0.84}O{sub 0.16}), and (Nb{sub 0.87}Si{sub 0.09}{open_square}{sub 0.04})(N{sub 0.87}O{sub 0.13}). Highlights: Black-Right-Pointing-Pointer Three Nb-oxynitrides doped either with Si, Al, Mg were bulk superconductors below {approx}17 K. Black-Right-Pointing-Pointer The cation vacancies induced by doping silicon act as pinning centers. Black-Right-Pointing-Pointer Themore » Si-doped sample had strong electron correlations.« less

Authors:
 [1];  [1]; ;  [2]; ;  [3];  [4]
  1. Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo 060-8628 (Japan)
  2. Racah Institute of Physics, The Hebrew University, Jerusalem 91904 (Israel)
  3. UGC-DAE-Consortium for Scientific Research, Khandwa Rd, Indore (MP) 452001 (India)
  4. Bhabha Atomic Research Centre, Mumbai 400085 (India)
Publication Date:
OSTI Identifier:
22012090
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry
Additional Journal Information:
Journal Volume: . 188; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; DOPED MATERIALS; ELECTRON CORRELATION; HYSTERESIS; MAGNETIZATION; NIOBIUM; NIOBIUM NITRIDES; OXIDES; SILICON; SPECIFIC HEAT; SUPERCONDUCTIVITY; SUPERCONDUCTORS; TEMPERATURE RANGE 0065-0273 K

Citation Formats

Ohashi, Y, Kikkawa, S, Felner, I, Tsindlekht, M I, Venkateshwarlu, D, Ganesan, V, and Yakhmi, J V. Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si). United States: N. p., 2012. Web. doi:10.1016/J.JSSC.2012.01.024.
Ohashi, Y, Kikkawa, S, Felner, I, Tsindlekht, M I, Venkateshwarlu, D, Ganesan, V, & Yakhmi, J V. Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si). United States. doi:10.1016/J.JSSC.2012.01.024.
Ohashi, Y, Kikkawa, S, Felner, I, Tsindlekht, M I, Venkateshwarlu, D, Ganesan, V, and Yakhmi, J V. Sun . "Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si)". United States. doi:10.1016/J.JSSC.2012.01.024.
@article{osti_22012090,
title = {Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si)},
author = {Ohashi, Y and Kikkawa, S and Felner, I and Tsindlekht, M I and Venkateshwarlu, D and Ganesan, V and Yakhmi, J V},
abstractNote = {Niobium compounds continue to be an interesting family of superconductors, with the recent addition of oxynitrides to it, which can be categorized as low-T{sub c} superconductors (LTS) because they exhibit superconductivity below T{sub c}{approx}17 K. In this paper, we report the superconducting properties of three members of the family of niobium oxynitrides, viz. (Nb{sub 0.89}Al{sub 0.11})(N{sub 0.84}O{sub 0.16}), (Nb{sub 0.95}Mg{sub 0.05})(N{sub 0.92}O{sub 0.08}) and (Nb{sub 0.87}Si{sub 0.09}{open_square}{sub 0.04})(N{sub 0.87}O{sub 0.13}). Low temperature dc and ac magnetization measurements have been performed. In addition, heat capacity has been recorded at low temperature under applied magnetic fields. A detailed analysis of the data is presented. - Graphical abstract: The doped Si oxide accompanied with some amount of cation vacancy in cubic NbN lattice induces relatively large magnetic hysteresis on isothermal hysteresis loops at 5 K of the dc magnetization up to 5 T among the four niobium oxynitrides containing main group elements, Nb{sub 1.00}(N{sub 0.98}O{sub 0.02}); (Nb{sub 0.95}Mg{sub 0.05})(N{sub 0.92}O{sub 0.08}); (Nb{sub 0.89}Al{sub 0.11})(N{sub 0.84}O{sub 0.16}), and (Nb{sub 0.87}Si{sub 0.09}{open_square}{sub 0.04})(N{sub 0.87}O{sub 0.13}). Highlights: Black-Right-Pointing-Pointer Three Nb-oxynitrides doped either with Si, Al, Mg were bulk superconductors below {approx}17 K. Black-Right-Pointing-Pointer The cation vacancies induced by doping silicon act as pinning centers. Black-Right-Pointing-Pointer The Si-doped sample had strong electron correlations.},
doi = {10.1016/J.JSSC.2012.01.024},
journal = {Journal of Solid State Chemistry},
issn = {0022-4596},
number = ,
volume = . 188,
place = {United States},
year = {2012},
month = {4}
}