Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
58 (1991), S. 2435-2437
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Because of the mixed metal valance state of thallium in a Tl-based superconductor, a nearly single "1223'' phase can be readily prepared by a modified Pechini method (US Patent 3 330 697). Tl2O3 and other metal nitrates are dissolved in an aqueous solution plus a certain amount of oxalic acid for chelating the metal cations. The desired phase shows zero resistance at 114 K and the phase purity is identified by x-ray diffraction. Characteristics of superconductivity also are evidenced by the Meissner effect. The preparation technique is considered valuable to purify multiphase superconductors for mass production.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.104865
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