Defect structure and superconducting transition temperature of ion-irradiated refractory metal carbides and nitrides

Naoto Kobayashi*, H. Tanoue, G. Linker

*この研究の対応する著者

研究成果: Article査読

13 被引用数 (Scopus)

抄録

Structural disorder and its influence on the superconducting transition temperature (Tc) of stoichiometric ZrN and HfN thin films irradiated with He ions (200 keV for ZrN and 400 keV for HfN) and Ar ions (600 keV for ZrN) have been investigated and compared to the results obtained for NbC films. With the preservation of the B1 phases, X-ray diffraction experiments have revealed lattice expansions at the first stage of ion irradiation (Δa0/a0 = 0.3% in ZrN and Δa0/a0 = 0.2% in HfN) like for ion-irradiated NbC films, whereas subsequent lattice contractions are smaller in both nitride films. Static atomic displacements of metal atoms in ZrN films have shown a variation similar to that of the lattice parameter, but those in HfN films have increased continuously with irradiation fluence. Tc's decreased continuously from 9.2 to 3.8K in ZrN and from 8.3 to 3.0K in HfN.

本文言語English
ページ(範囲)795-798
ページ数4
ジャーナルNuclear Inst. and Methods in Physics Research, B
33
1-4
DOI
出版ステータスPublished - 1988 6月 2
外部発表はい

ASJC Scopus subject areas

  • 表面、皮膜および薄膜
  • 器械工学
  • 表面および界面

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