HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Crystal structure and superconductive characteristics of Nb0.89Al0.11 oxynitrides

Files in This Item:
JSSC183-7_1710-1714.pdf271.73 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Crystal structure and superconductive characteristics of Nb0.89Al0.11 oxynitrides
Authors: Ohashi, Yoshio Browse this author
Motohashi, Teruki Browse this author
Masubuchi, Yuji Browse this author
Kikkawa, Shinichi Browse this author
Keywords: Niobium-aluminum oxynitrides
Crystal structure
Structural transformation
Issue Date: Jul-2010
Publisher: Elsevier
Journal Title: Journal of Solid State Chemistry
Volume: 183
Issue: 7
Start Page: 1710
End Page: 1714
Publisher DOI: 10.1016/j.jssc.2010.05.023
Abstract: The crystal structure and superconductive characteristics of the niobium-aluminum oxynitrides were investigated. Single-phase products were successfully obtained starting from a cation ratio of Nb0.89Al0.11. The as-nitrided product crystallized in a cation-deficient rock-salt type structure with a chemical formula of (Nb0.60Al0.08 □0.32)(O0.21N0.79), while annealing at 1773 K under a nitrogen pressure of 0.5 MPa led to a highly crystallized product with a simple rock-salt type structure represented as (Nb0.89Al0.11)(O0.17N0.85). Upon post-annealing, both the critical temperature (Tc) and the superconductive volume fraction (V_[SC]) of the oxynitride were significantly enhanced from Tc ≈ 7 K and V_[SC]=23% for the as-nitrided product to Tc = 17.3 K and V_[SC]=91% for the post-annealed product.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 本橋 輝樹

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University