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

R. Gandikota; R. K. Singh; J. Kim; B. Wilkens; N. Newman; J. M. Rowell; A. V. Pogrebnyakov; X. X. Xi; J. M. Redwing; S. Y. Xu; Q. Li

doi:10.1063/1.1845591

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

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

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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 language	English (US)
Article number	012508
Pages (from-to)	012508-1-012508-3
Journal	Applied Physics Letters
Volume	86
Issue number	1
DOIs	https://doi.org/10.1063/1.1845591
State	Published - Jan 2005

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Physics and Astronomy (miscellaneous)

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10.1063/1.1845591

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@article{66669bc03d0a4aee82521cd1ab6cdfaa,

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

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.",

author = "R. Gandikota and Singh, {R. K.} and J. Kim and B. Wilkens and N. Newman and Rowell, {J. M.} and Pogrebnyakov, {A. V.} and Xi, {X. X.} and Redwing, {J. M.} and Xu, {S. Y.} and Q. Li",

note = "Funding Information: The work at ASU was supported by ONR under Grant No. N00014-02-1-0002. The authors acknowledge use of facilities in the Center for Solid-State Science at ASU. The work at PSU was supported in part by ONR under Grant Nos. N00014-00-1-0294 (for X.X.X.) and N0014-01-1-0006 (for J.M.Re.), by NSF under Grant Nos. DMR-0306746 (for X.X.X. and J.M.Re.), and DMR-9876266 and DMR-9972973 (for Q.L.).",

year = "2005",

month = jan,

doi = "10.1063/1.1845591",

language = "English (US)",

volume = "86",

pages = "012508--1--012508--3",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Effect of damage by 2 MeV He ions on the normal and superconducting properties of magnesium diboride

AU - Gandikota, R.

AU - Singh, R. K.

AU - Kim, J.

AU - Wilkens, B.

AU - Newman, N.

AU - Rowell, J. M.

AU - Pogrebnyakov, A. V.

AU - Xi, X. X.

AU - Redwing, J. M.

AU - Xu, S. Y.

AU - Li, Q.

N1 - Funding Information: The work at ASU was supported by ONR under Grant No. N00014-02-1-0002. The authors acknowledge use of facilities in the Center for Solid-State Science at ASU. The work at PSU was supported in part by ONR under Grant Nos. N00014-00-1-0294 (for X.X.X.) and N0014-01-1-0006 (for J.M.Re.), by NSF under Grant Nos. DMR-0306746 (for X.X.X. and J.M.Re.), and DMR-9876266 and DMR-9972973 (for Q.L.).

PY - 2005/1

Y1 - 2005/1

N2 - 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.

AB - 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.

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JF - Applied Physics Letters

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ER -

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

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