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Digitale Medien

Effects of Carbonate Defects on the Superconductivity of HgBa2CuO4+δ (1999)

Yamamoto, Ayako ; Hu, Wei-Zhi ; Izumit, Fujio ; [weitere]

Springer

Journal of low temperature physics 117 (1999), S. 789-793

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Details

ISSN: 1573-7357

Quelle: Springer Online Journal Archives 1860-2000

Thema: Physik

Notizen: Abstract Carbon contents inHgBa 2 CuO 4+δ andstarting materials (HgO, BaO, and CuO) for preparing it weredetermined by infrared spectroscopy to examine influences ofCO 3 2- ions substituted for[HgO 2 ] 2− groups on itssuperconducting properties. Measurements of DC magnetic susceptibilitiesand resistivities revealed that superconducting transition in anoxygen-annealed sample with a minimum C content of 0.88 mol% wasvery sharp with T c 's of 98.0 K (negativemagnetization) and 96.5 K (zero resistance),respectively. They are the highest T c 's thathave ever been attained inHgBa 2 CuO 4+δ including single crystals. Structural data obtained by neutronpowder diffraction showed our sample to have high quality and a δvalue of 0.122(5).

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1022565832711

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