Point Defects Creation by Swift Heavy Ion Irradiation Induced Low Energy Electrons in YBa[sub 2]Cu[sub 3]O[sub 7−y] through Dissociative Recombination

Biswal, R.; John, J.; Behera, D.; Kanjilal, D.; Avasthi, D.K.; Mishra, N. C.

doi:10.1063/1.3027166

Cited by 3 publications

(1 citation statement)

References 7 publications

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“…This can be explained by the effect of different displacement energies for oxygen in different sites. The displacement energy for O in CuO 2 planes has been evaluated as 8.4 eV, which is about three times that for the chain oxygen (2.8 eV) 29 , 30 . In this paper, the irradiation species’ energy is above the threshold energy for oxygen displacement, which is supposed to cause point defects in both planes and chains.…”

Section: Resultsmentioning

confidence: 99%

Dynamic behavior of reversible oxygen migration in irradiated-annealed high temperature superconducting wires

Zhang¹,

Rupich²,

Solovyov³

et al. 2020

Sci Rep

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We use atomically resolved scanning transmission electron microscopy and electron energy loss spectroscopy to determine the atomic-scale structural, chemical and electronic properties of artificial engineered defects in irradiated-annealed high temperature superconducting wires based on epitaxial Y(Dy)BCO film. We directly probe the oxygen vacancy defects in both plane and chain sites after irradiation with 18-meV Au ions. The plane site vacancies are reoccupied during post-annealing treatment. Our results demonstrate the dynamic reversible behavior of oxygen point defects, which explains the depression and recovery of self-field critical current and critical temperature in irradiation-annealing process. These findings reveal the strong effect of oxygen vacancies in different sites on the superconductivity properties of irradiated Y(Dy)BCO film, and provide important insights into defects engineering of 2G HTS coil wires.

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Section: Resultsmentioning

confidence: 99%

Dynamic behavior of reversible oxygen migration in irradiated-annealed high temperature superconducting wires

Zhang¹,

Rupich²,

Solovyov³

et al. 2020

Sci Rep

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show abstract

Simulating Structure, Magnetism and Electronic Properties of Monoatomic, Binary and Ternary Transition Metal Nanoclusters

Entel¹,

Gruner²,

Hucht³

et al. 2008

AIP Conference Proceedings

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200 MeV silver ion irradiation induced structural modification in YBa2Cu3O7−y thin films at 89 K: An in situ x-ray diffraction study

Biswal¹,

John²,

Mallick

et al. 2009

Journal of Applied Physics

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We report in situ x-ray diffraction (XRD) study of 200 MeV Ag ion irradiation induced structural modification in c-axis oriented YBa2Cu3O7−y (YBCO) thin films at 89 K. The films remained c-axis oriented up to a fluence of 2×1013 ionscm−2, where complete amorphization sets in. The amorphous ion tracks, the strained region around these tracks, and irradiation induced point defects are shown to control the evolution of the structure with ion fluence. Secondary electrons emanating from the ion paths are shown to create point defects in a cylindrical region of 97 nm radius, which corresponds to their maximum range in the YBCO medium. The point defects are created exclusively in the CuO basal planes of fully oxygenated YBCO, which has not been possible, by other techniques including low energy ion irradiation and thermal quenching. The point defects led to a faster decrease in the integral intensity of XRD peaks at very low fluences of irradiation (Φ≤3×1010 ionscm−2) than what can be expected from amorphous tracks. The radius of amorphous ion tracks, estimated from the fluence dependence of integral XRD peak intensity beyond this fluence, was found to be 1.9 nm. Both point defect and the strained region around amorphous ion tracks are shown to contribute to the increase in the c-parameter at 89 K. The full width at half maximum (FWHM) of XRD peaks arising mostly due to the strained region around the ion tracks showed an incubation effect up to 1012 ionscm−2, before increasing at higher fluences. Fluence dependence of FWHM gives the cross section of the strained region as 37.9 nm2, which is more than three times the cross section of the amorphous ion tracks.

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Point Defects Creation by Swift Heavy Ion Irradiation Induced Low Energy Electrons in YBa[sub 2]Cu[sub 3]O[sub 7−y] through Dissociative Recombination

Cited by 3 publications

References 7 publications

Dynamic behavior of reversible oxygen migration in irradiated-annealed high temperature superconducting wires

Dynamic behavior of reversible oxygen migration in irradiated-annealed high temperature superconducting wires

Simulating Structure, Magnetism and Electronic Properties of Monoatomic, Binary and Ternary Transition Metal Nanoclusters

200 MeV silver ion irradiation induced structural modification in YBa2Cu3O7−y thin films at 89 K: An in situ x-ray diffraction study

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