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(Hg23Tl43)Ba2CaCu2O8+δ, a 2212 type superconductor

✍ Scribed by I. Bryntse

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
355 KB
Volume
226
Category
Article
ISSN
0921-4534

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✦ Synopsis

A new Hg, Tl based superconductor, Hg,,,T1,,,BazCaC'u~08,n.

has been synthesized in sealed quartz ampoules at trmpcratures 720-820°C. The structure is similar to that of TI-22 12. TlZBazCaCuz08+,,. \ith a tetragonal unit cell (u=3.8534(4) -. ('= 29.385( 5) A. space group 14/mmm). The composition of the phase was determined by energ)-dispersive spectrometry analysis and it was studied with X-ray powder diffraction, as well as scanning and transmission electron microscopy. By .AC susceptibility measurements the onset of the superconducting transition temperature was found to be IO0 K.

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205Tl NMR in oxygen depleted cuprate sup
205Tl NMR in oxygen depleted cuprate superconductors Tl2Ba2CaCu2O8−δ
✍ N. Winzek; Hj. Mattausch; S.-G. Eriksson; C. Ström; R.K. Kremer; A. Simon; M. Me 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 714 KB

We report on the NMR Knight shift of 2°5T1 in Tl2Ba2CaCuzO8\_~ for different ~. Due to the variation of the oxygen content, T c ranges from 85 K up to 105 K. The 2°~T1 spectra consist of two lines, where the main line is due to Tl( l ) in the TiP-layer whereas the defect line corresponds to Tl (2) r