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Superconductor-insulator transition in Nd2−xCexCuO4 single-crystal thin films

✍ Scribed by Satoshi Tanda; Shigeki Ozeki; Minoru Honma; Akihiko Ohi; Tsuneyoshi Nakayama

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
146 KB
Volume
185-189
Category
Article
ISSN
0921-4534

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✦ Synopsis

The transport properties of lfigh-T, oxide-superconductor Nd2_,Ce~CuO~ single-crystM thin fihns were investigated to clarify the superconductor-insulator transition in two-dimensional disordered system. It is found that the critical sheet resistance P~ at the onset of superconductivity takes a value wiLhin a range from 6kft to 8kf~, which is close to the value h/4c-~=6.45ks2. Our experiments provide with an interesting system for revealing the physical origin of the superconductor-insulator transition.

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Critical currents and relaxation effects
Critical currents and relaxation effects in Nd2 − xCexCuO4 − y single crystals
✍ J. Fontcuberta; S. Piñol; X. Obradors; F. Lera; C. Rillo 📂 Article 📅 1990 🏛 Elsevier Science 🌐 English ⚖ 383 KB

Inductive critical current and field cooled (FC) magnetic relaxation measurements were carried out on a Nd2\_xCe,CuO4\_v (x = 0.15) single crystal for H II c. A zero field Jc N value of 1.5 x 104 A cm -2 was obtained at 4.2 K, together with logarithmic magnetic field dependence. The relaxation data