Effect of damage by 2 MeV He ions on the normal and superconducting properties of magnesium diboride

R. Gandikota, Rakesh Singh, J. Kim, B. Wilkens, Nathan Newman, J. M. Rowell, A. V. Pogrebnyakov, X. X. Xi, J. M. Redwing, S. Y. Xu, Q. Li

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49 Citations (Scopus)

Abstract

We have studied the effect of damage induced by 2 MeV alpha particles on the critical temperature, Tc, and resistivity, ρ, of Mg B2 thin films. This technique allows defects to be controllably introduced into Mg B2 in small successive steps. Tc decreases linearly as the intragrain resistivity at 40 K increases, while the intergrain connectivity is not changed. Tc is ultimately reduced to less than 7 K and we see no evidence for a saturation of Tc at about 20 K, contrary to the predictions of the Tc of Mg B2 in the dirty limit of interband scattering.

Original languageEnglish (US)
Article number012508
JournalApplied Physics Letters
Volume86
Issue number1
DOIs
StatePublished - Jan 2005

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magnesium
damage
electrical resistivity
alpha particles
critical temperature
ions
saturation
defects
thin films
predictions
scattering

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Effect of damage by 2 MeV He ions on the normal and superconducting properties of magnesium diboride. / Gandikota, R.; Singh, Rakesh; Kim, J.; Wilkens, B.; Newman, Nathan; Rowell, J. M.; Pogrebnyakov, A. V.; Xi, X. X.; Redwing, J. M.; Xu, S. Y.; Li, Q.

In: Applied Physics Letters, Vol. 86, No. 1, 012508, 01.2005.

Research output: Contribution to journalArticle

Gandikota, R, Singh, R, Kim, J, Wilkens, B, Newman, N, Rowell, JM, Pogrebnyakov, AV, Xi, XX, Redwing, JM, Xu, SY & Li, Q 2005, 'Effect of damage by 2 MeV He ions on the normal and superconducting properties of magnesium diboride', Applied Physics Letters, vol. 86, no. 1, 012508. https://doi.org/10.1063/1.1845591
Gandikota, R. ; Singh, Rakesh ; Kim, J. ; Wilkens, B. ; Newman, Nathan ; Rowell, J. M. ; Pogrebnyakov, A. V. ; Xi, X. X. ; Redwing, J. M. ; Xu, S. Y. ; Li, Q. / Effect of damage by 2 MeV He ions on the normal and superconducting properties of magnesium diboride. In: Applied Physics Letters. 2005 ; Vol. 86, No. 1.
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