Synthesis and characterization of superconducting single crystals of HgBa2Ca2Cu3O8+δ
1994; Elsevier BV; Volume: 233; Issue: 3-4 Linguagem: Inglês
10.1016/0921-4534(94)90747-1
ISSN1873-2143
AutoresD. Colson, A. Bertinotti, J. Hammann, J.F. Marucco, A. Pinatel,
Tópico(s)Superconducting Materials and Applications
ResumoHgBa2Ca2Cu3O8+δ single crystals of submillimeter size were grown in a single-step synthesis under normal pressure. The crystals were examined by X-ray diffraction, energy dispersive X-ray analysis (EDX), scanning electron microscopy and magnetic measurements. The "as-grown" single crystals have a Tc of 120 K, as defined by the onset of diamagnetism. After annealing in oxygen at 300°C for 6 h, they can display a sharp superconducting transition temperature as high as 135 K.
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