Effects of 1-MeV proton irradiation in Hg-based cuprate thin films

Journal Article · Tue Jul 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.862· OSTI ID:531832

Gapud, A A ^[1]; Liu, J R ^[2]; Wu, J Z ^[1]; Kang, W N ^[2]; Kang, B W; Yun, S H ^[1]; Chu, W K ^[2]

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1. Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)
2. Texas Center for Superconductivity at University of Houston, Houston, Texas 77204-5932 (United States)

We have studied the effects of 1-Mev proton irradiation on both superconducting properties and normal state resistivity of high-quality HgBa{sub 2}CaCu{sub 2}O{sub 6+{delta}} (Hg-1212) and HgBa{sub 2}Ca{sub 2}Cu{sub 3}O{sub 8+{delta}} (Hg-1223) thin films. At low proton doses, we observed a linear decrease of the superconducting transition temperature T{sub c} and a linear increase of the extrapolated residual resistivity as proton dose is increased. This is consistent with observations of other high-T{sub c} superconductors while a lower dose threshold for suppressing the superconductivity is found in Hg-1212 and Hg-1223 films. To explain the linear dose dependence of T{sub c}, we propose a model based on the proximity effect. An enhancement of up to 90{percent} in the critical current density at low fields has also been observed in these films at low proton fluences that do not significantly degrade T{sub c}. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 531832
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 2 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
CALCIUM OXIDES
COPPER OXIDES
CRITICAL CURRENT
CRITICAL TEMPERATURE
CURRENT DENSITY
ELECTRIC CONDUCTIVITY
HIGH-TC SUPERCONDUCTORS
MERCURY OXIDES
MEV RANGE 01-10
PHYSICAL RADIATION EFFECTS
PROTON BEAMS
PROXIMITY EFFECT
SUPERCONDUCTING FILMS
SUPERCONDUCTIVITY
THIN FILMS
TRANSITION TEMPERATURE