✦ LIBER ✦

Anisotropy of critical current and anomalous upturn feature of parallel upper critical fields in the superconducting Nb/Nb0.5Zr0.5 multilayer

✍ Scribed by Y. Kuwasawa; T. Tosaka; A. Uchiyama; S. Matuda; S. Nakano

Publisher: Elsevier Science
Year: 1991
Tongue: English
Weight: 437 KB
Volume: 175
Category: Article
ISSN: 0921-4534
DOI: 10.1016/0921-4534(91)90251-s

No coin nor oath required. For personal study only.

✦ Synopsis

Measurements

of the critical current J, have been made for the Nb/Nb,&,, multilayer which showed a sharp upturn behavior in a parallel upper critical field W,,,,(T), caused by the shift of the order-parameter A(r) from Nb-to NbZr-layers.

In the region where A(r) is localized in the Nb-layers, the peak was observed in the J,-H curves for parallel field orientation.

With increasing temperature, the J,-peak value drastically decreased and its position was shifting to a lower field. In the angular dependence of the critical current density, J,(e) had a maximum when the flux lines are exactly aligned in parallel to the layer and sharply decreased with tilting of angle. The feature is caused by an intrinsic flux pinning mechanism. In the upturn region, we found the same characteristics of J,.

📜 SIMILAR VOLUMES

Anisotropy in the electrical resistivity

Anisotropy in the electrical resistivity and upper critical magnetic field of single-crystal Pb2Sr2Ho0.5Ca0.5Cu3O8

✍ T. Noji; Y. Koike; H. Iwasaki; M. Kato; N. Kobayashi; Y. Saito 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 216 KB

The anisotropy in the electrical resistivity 0 and the anisotropy in the upper critical magnetic field lt,z have been hwestigated for Pb~SrzHoo.sCao.sCu30 s single crystals. The anisotropy in the resistivity. ;), O,b, is 29 at 300K and 140 at 100K. The anisotropy in Ha has been determined from the a

Asymmetric critical currents of Nb and Y

Asymmetric critical currents of Nb and YBCO thin films for the polarity of the transport current in parallel magnetic fields

✍ F. Ichikawa; T. Nishizaki; K. Yamabe; Y. Yamasaki; T. Fukami; T. Aomine 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 154 KB

In order to investigate a surface effect on flux pinning, transport critical currents J¢ of Nb and YBa2Cu3Ov\_z thin films have been measured in magnetic fields B parallel to the surface. It is found that in both fihns the magnitude of Jc changes when tile direction of the Lorentz force is reversed.