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

Naoto Kobayashi, H. Tanoue, G. Linker

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)795-798
Number of pages4
JournalNuclear Inst. and Methods in Physics Research, B
Volume33
Issue number1-4
DOIs
Publication statusPublished - 1988 Jun 2
Externally publishedYes

Fingerprint

refractory metals
Refractory metals
Defect structures
Nitrides
carbides
Superconducting transition temperature
nitrides
Carbides
transition temperature
Ions
defects
ions
Ion bombardment
ion irradiation
Lattice constants
contraction
lattice parameters
fluence
Metals
Irradiation

ASJC Scopus subject areas

  • Surfaces, Coatings and Films
  • Instrumentation
  • Surfaces and Interfaces

Cite this

Defect structure and superconducting transition temperature of ion-irradiated refractory metal carbides and nitrides. / Kobayashi, Naoto; Tanoue, H.; Linker, G.

In: Nuclear Inst. and Methods in Physics Research, B, Vol. 33, No. 1-4, 02.06.1988, p. 795-798.

Research output: Contribution to journalArticle

@article{d51cb942303c4f629c44c7f4a03eb5bb,
title = "Defect structure and superconducting transition temperature of ion-irradiated refractory metal carbides and nitrides",
abstract = "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.",
author = "Naoto Kobayashi and H. Tanoue and G. Linker",
year = "1988",
month = "6",
day = "2",
doi = "10.1016/0168-583X(88)90685-4",
language = "English",
volume = "33",
pages = "795--798",
journal = "Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms",
issn = "0168-583X",
publisher = "Elsevier",
number = "1-4",

}

TY - JOUR

T1 - Defect structure and superconducting transition temperature of ion-irradiated refractory metal carbides and nitrides

AU - Kobayashi, Naoto

AU - Tanoue, H.

AU - Linker, G.

PY - 1988/6/2

Y1 - 1988/6/2

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0024019805&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024019805&partnerID=8YFLogxK

U2 - 10.1016/0168-583X(88)90685-4

DO - 10.1016/0168-583X(88)90685-4

M3 - Article

AN - SCOPUS:0024019805

VL - 33

SP - 795

EP - 798

JO - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

JF - Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms

SN - 0168-583X

IS - 1-4

ER -