Effects of carbonate defects on the superconductivity of HgBa{sub 2}CuO{sub 4+{delta}}
Journal Article
·
· Journal of Low Temperature Physics
Carbon contents in HgBa{sub 2}CuO{sub 4+{delta}} and starting materials (HgO, BaO, and CuO) for preparing it were determined by infrared spectroscopy to examine influences of CO{sup 2{minus}}{sub 3} ions substituted for [HgO{sub 2}]{sup 2{minus}} groups on its superconducting properties. Measurements of Dc magnetic susceptibilities and resistivities revealed that superconducting transition in an oxygen-annealed sample with a minimum C content of 0.88 mol% was very sharp with {Tc}'s of 98.0 K (negative magnetization) and 96.5 K (zero resistance), respectively. They are the highest {Tc}'s that have ever been attained in HgBa{sub 2}CuO{sub 4+{delta}} including single crystals. Structural data obtained by neutron powder diffraction showed the sample to have high quality and a {delta} value of 0.122(5).
- Research Organization:
- ISTEC-SRL, Tokyo (JP)
- OSTI ID:
- 20012878
- Journal Information:
- Journal of Low Temperature Physics, Journal Name: Journal of Low Temperature Physics Journal Issue: 3-4 Vol. 117; ISSN 0022-2291; ISSN JLTPAC
- Country of Publication:
- United States
- Language:
- English
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