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Scientific article
English

Magnetic properties of the Tl2Ba2Cu1O6+δ 90K superconductor

Published inJournal of Alloys and Compounds, vol. 195, p. 607-610
Publication date1993
Abstract

We have measured magnetic properties of high quality Tl2Ba2Cu1O6+δ 90 K tetragonal superconducting and orthorhombic metallic non-superconducting ceramics. The AC susceptibility shows distinct intra- and intergrain transitions down to H=0.004 Oe rms. The field cooling measurement at 20 Oe shows a sharp transition at 90 K and 50% of full flux exclusion at 5 K. At T>150 K, i.e. above the region where superconducting fluctuations contribute, the normal-state susceptibility is temperature independent and diamagnetic with a value of −5×10−8 emu/g. The intergrain critical current densities determined at B=1 T, using Bean's critical state model, are very low, 6×103 A/cm2 at 5 K and below 1 A/cm2 at 40 K.

Citation (ISO format)
TRISCONE, Gilles et al. Magnetic properties of the Tl<sub>2</sub>Ba<sub>2</sub>Cu<sub>1</sub>O<sub>6+δ</sub> 90K superconductor. In: Journal of Alloys and Compounds, 1993, vol. 195, p. 607–610. doi: 10.1016/0925-8388(93)90811-Z
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ISSN of the journal0925-8388
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