Effects of 1-MeV proton irradiation in Hg-based cuprate thin films
- Department of Physics and Astronomy, University of Kansas, Lawrence, Kansas 66045 (United States)
- 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, Vol. 56, Issue 2; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
MERCURY OXIDES
PHYSICAL RADIATION EFFECTS
ELECTRIC CONDUCTIVITY
SUPERCONDUCTIVITY
BARIUM OXIDES
COPPER OXIDES
CALCIUM OXIDES
MEV RANGE 01-10
HIGH-TC SUPERCONDUCTORS
PROXIMITY EFFECT
CRITICAL CURRENT
CRITICAL TEMPERATURE
CURRENT DENSITY
PROTON BEAMS
TRANSITION TEMPERATURE
THIN FILMS
SUPERCONDUCTING FILMS