Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13})

Ohashi, Y.; Masubuchi, Y.; Venkateshwarlu, D.; Ganesan, V.; Yakhmi, J. V.; Yoshida, T.

doi:10.1016/J.JSSC.2013.11.034

Title: Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13})

Full Record
Other Related Research

Abstract

The superconducting transition temperature of niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}) exhibits a gradual reduction from 16.8 K to around 11 K under an increasing applied magnetic field of up to 14 T. This relatively small T{sub c} reduction under an applied magnetic field suggests a robustness of its superconducting behavior in comparison to that in the parent niobium oxynitride. It was similar to the flux pinning effect observed in the large magnetic hysteresis of the niobium-silicon oxynitrides in our previous study. Both Si K-edge XANES and {sup 29}Si MAS-NMR indicated that the local structure of pinning centers around the silicon atoms close to cationic vacancies was similar to that of Si in amorphous SiO{sub 2} in the rock-salt structure of niobium oxynitride. - Graphical abstract: Potential energy scan of the Si atom in the most stable Si{sub 3}□O{sub 3}N cube around the vacancy in our preliminary simulation on niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}). A possible distortion of the Si atom was suggested from its octahedral towards tetrahedral position forming the local structure similar to that in amorphous SiO{sub 2}. Display Omitted - Highlights: • Critical current density was enhanced in superconducting niobiummore »« less

Authors:

Ohashi, Y.; Masubuchi, Y. ^[1]; Venkateshwarlu, D.; Ganesan, V. ^[2]; Yakhmi, J. V. ^[3]; Yoshida, T. ^[4]

Faculty of Engineering, Hokkaido University, N13W8, Kita-ku, Sapporo, Hokkaido 060-8628 (Japan)
UGC-DAE-Consortium for Scientific Research, Khandwa Rd, Indore 452001, Madhya Pradesh (India)
Homi Bhabha National Institute, Anushaktinagar, Mumbai-400 094 (India)
EcoTopia Science Institute, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8603 (Japan)

Publication Date:: Sat Feb 15 00:00:00 EST 2014

OSTI Identifier:: 22274221

Resource Type:: Journal Article

Journal Name:: Journal of Solid State Chemistry

Additional Journal Information:: Journal Volume: 210; Journal Issue: 1; Other Information: Copyright (c) 2013 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; 77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION SPECTROSCOPY; HYSTERESIS; MAGNETIC FIELDS; MAGNETIC FLUX; NIOBIUM; NUCLEAR MAGNETIC RESONANCE; POTENTIAL ENERGY; SILICA; SILICON; SILICON OXIDES; SIMULATION; SUPERCONDUCTORS; TRANSITION TEMPERATURE; X-RAY SPECTROSCOPY

Citation Formats


                    Ohashi, Y., Masubuchi, Y., Venkateshwarlu, D., Ganesan, V., Yakhmi, J. V., Yoshida, T., and Kikkawa, S., E-mail: kikkawa@eng.hokudai.ac.jp. Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}).  United States: N. p., 2014. 
        Web.  doi:10.1016/J.JSSC.2013.11.034.

Copy to clipboard


                    Ohashi, Y., Masubuchi, Y., Venkateshwarlu, D., Ganesan, V., Yakhmi, J. V., Yoshida, T., & Kikkawa, S., E-mail: kikkawa@eng.hokudai.ac.jp. Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}).  United States.  https://doi.org/10.1016/J.JSSC.2013.11.034

Copy to clipboard


                    Ohashi, Y., Masubuchi, Y., Venkateshwarlu, D., Ganesan, V., Yakhmi, J. V., Yoshida, T., and Kikkawa, S., E-mail: kikkawa@eng.hokudai.ac.jp. 2014.  
        "Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13})".  United States.  https://doi.org/10.1016/J.JSSC.2013.11.034.

Copy to clipboard


                    
@article{osti_22274221,

  title        = {Local structure around the flux pinning centers in superconducting niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13})},

  author       = {Ohashi, Y. and Masubuchi, Y. and Venkateshwarlu, D. and Ganesan, V. and Yakhmi, J. V. and Yoshida, T. and Kikkawa, S., E-mail: kikkawa@eng.hokudai.ac.jp},

  abstractNote = {The superconducting transition temperature of niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}) exhibits a gradual reduction from 16.8 K to around 11 K under an increasing applied magnetic field of up to 14 T. This relatively small T{sub c} reduction under an applied magnetic field suggests a robustness of its superconducting behavior in comparison to that in the parent niobium oxynitride. It was similar to the flux pinning effect observed in the large magnetic hysteresis of the niobium-silicon oxynitrides in our previous study. Both Si K-edge XANES and {sup 29}Si MAS-NMR indicated that the local structure of pinning centers around the silicon atoms close to cationic vacancies was similar to that of Si in amorphous SiO{sub 2} in the rock-salt structure of niobium oxynitride. - Graphical abstract: Potential energy scan of the Si atom in the most stable Si{sub 3}□O{sub 3}N cube around the vacancy in our preliminary simulation on niobium silicon oxynitride (Nb{sub 0.87}Si{sub 0.09}□{sub 0.04})(N{sub 0.87}O{sub 0.13}). A possible distortion of the Si atom was suggested from its octahedral towards tetrahedral position forming the local structure similar to that in amorphous SiO{sub 2}. Display Omitted - Highlights: • Critical current density was enhanced in superconducting niobium oxynitride. • The robustness was introduced by forming rock-salt type niobium silicon oxynitride. • The silicon atom had a local structure similar to that in amorphous SiO{sub 2} in the rock-salt type lattice. • The local structure was formed together with its neighboring cationic vacancy. • It contributed as the flux pinning center in the NbSiNO.},

  doi          = {10.1016/J.JSSC.2013.11.034},

  url          = {https://www.osti.gov/biblio/22274221},
  journal      = {Journal of Solid State Chemistry},

  issn         = {0022-4596},

  number       = 1,

  volume       = 210,

  place        = {United States},

  year         = {Sat Feb 15 00:00:00 EST 2014},

  month        = {Sat Feb 15 00:00:00 EST 2014}

}

Copy to clipboard

Journal Article:

https://doi.org/10.1016/J.JSSC.2013.11.034

Other availability

Find in Google Scholar

Search WorldCat to find libraries that may hold this journal

Save / Share:

Export Metadata

Save to My Library

Similar records in OSTI.GOV collections:

Preparation, crystal structure, and superconductive characteristics of new oxynitrides (Nb{sub 1-x}M{sub x})(N{sub 1-y}O{sub y}) where M=Mg, Si, and x{approx}y

Journal Article Ohashi, Yoshio; Motohashi, Teruki; Masubuchi, Yuji; ... - Journal of Solid State Chemistry

New niobium oxynitrides containing either magnesium or silicon were prepared at 1000 deg. C by ammonia nitridation of oxide precursors obtained via the citrate route. The products had rock-salt type crystal structures. Crystallinity was improved by annealing in 0.5 MPa N{sub 2} and the final compositions were (Nb{sub 0.95}Mg{sub 0.05})(N{sub 0.92}O{sub 0.08}) at 1500 deg. C and (Nb{sub 0.87}Si{sub 0.09{open_square}0.04})(N{sub 0.87}O{sub 0.13}) at 1200 deg. C. The magnesium and oxide ions partially co-substitute the niobium and nitride ions in the octahedral sites of the {delta}-NbN lattice, respectively. Silicon ions were also successfully doped together with oxide ions into the rock-saltmore »« less
https://doi.org/10.1016/j.jssc.2011.06.003
Superconductivity in quaternary niobium oxynitrides containing main group elements (M=Mg, Al, Si)

Journal Article Ohashi, Y; Kikkawa, S; Felner, I; ... - Journal of Solid State Chemistry

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 datamore »« less
https://doi.org/10.1016/J.JSSC.2012.01.024
Crystal structure of the (K{sub 0.87}Bi{sub 0.13})BiO{sub 3} superconductor

Journal Article Khasanova, N; Yoshida, K; Yamamoto, A; ... - Journal of Solid State Chemistry

The structure of a superconducting oxide (K{sub 0.87}Bi{sub 0.13})BiO{sub 3} ({Tc} {approx} 10.2 K) prepared under high pressure was analyzed by time-of-flight neutron powder diffraction. Rietveld refinement showed this compound to be a cubic perovskite ABO{sub 3} with space group Pm{bar 3}m (No. 221) and lattice parameter a = 4.23377(3) {angstrom}. Refinement of occupation factors revealed the absence of oxygen vacancies and the substitution of Bi{sup 3+} ions for 13% of K{sup +} ions at the A site, presenting evidence for electron doping in this superconductor. Extraordinarily large atomic displacement parameters for the A and O sites are believed tomore »« less
https://doi.org/10.1006/jssc.1998.8170
Acid-leaching of sodium brannerite: Synthesis and structure of Na{sub 0.13}(V{sub 0.13}Mo{sub 0.87})O{sub 3} {center_dot} nH{sub 2}O

Journal Article Hu, Y; Davies, P - Journal of Solid State Chemistry

In dilute hydrochloric acid NaVMoO{sub 6}, which has a layered {open_quotes}brannerite{close_quotes} structure, participates in an acid-leaching reaction that results in the formation of a metastable compound with the stoichiometry Na{sub 0.13}(V{sub 0.13}Mo{sub 0.87})O{sub 3} {center_dot} nH{sub 2}O and the structure of {open_quotes}hexagonal{close_quotes} MoO{sub 3}. The locations of the sodium ions and water molecules in the channels of this structure, space group P6{sub 3} with a = 10.628(1) {angstrom} and c = 3.6975(7) {angstrom}, were determined through Rietveld refinement of powder neutron diffraction data collected on deuterated samples. The water molecules are important in providing a stable environment for the sodiummore »« less
https://doi.org/10.1016/0022-4596(95)80027-M
The phase transitions between H{sub 0.13}V{sub 0.13}Mo{sub 0.87}O{sub 3}{center_dot}0.26H{sub 2}O and MoO{sub 3}: An X-ray, thermal analysis, and TEM study

Journal Article Dupont, L; Larcher, D; Touboul, M - Journal of Solid State Chemistry

Mixed vanadium-molybdenum oxide hydrates (H{sub x}V{sub x}Mo{sub 1{minus}x}O{sub 3}{center_dot}0.26H{sub 2}O with 0.06 {le} x {le} 0.18) have been synthesized by a soft chemistry method. The phase transitions from one of these hydrates (x = 0.13) to the final product MoO{sub 3} have been studied by thermal analysis, X-ray powder diffraction, and transmission electron microscopy techniques. Both metastable and stable oxides have been observed. H{sub 0.13}V{sub 0.13}Mo{sub 0.87}O{sub 3}{center_dot}0.26H{sub 2}O possesses a structure related to hexagonal MoO{sub 3}. Dehydration of the precursor leads to a metastable phase H{sub 0.13}V{sub 0.13}Mo{sub 0.87}O{sub 3}, with a structure similar to that of the hydrate.more »« less
https://doi.org/10.1006/jssc.1998.8067

Similar Records