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In-situcharacterization of transport properties of superconducting (Cu, C)-1201 films
| Content Provider | Scilit |
|---|---|
| Author | Kikunaga, Kazuya Yamamoto, Yoshihisa Mitsunaga, Masaharu Mahara, Yasunori Tanaka, Yasumoto Kikuchi, Nobuhiko Tokiwa, Kazuyasu Watanabe, Tsuyoshi Terada, Norio |
| Copyright Year | 2009 |
| Description | Journal: Journal of Physics: Conference Series Transport properties of (Cu, C)-1201 thin films have been characterized by in-situ four probe method without breaking vacuum, subsequent to their growth by pulsed laser deposition, in order to clarify intrinsic transport properties. Owing to the in-situ measurements, degradation of contact resistance and normal state conductivity were successfully suppressed. Obtained results reveal the positive correlation between $T_{c}$ and normal state conductivity δ at 290 K, and that between $T_{c}$ and temperature coefficient of resistivity (TCR) at 290 K. The films exhibit $T_{c(ρ=0)}$ > 20 K on the cases of $δ_{[290 K]}$ > 4 x $10^{2}$ S/cm and TCR > 1.5 x $10^{-3}$ $K^{-1}$. The high $T_{c}$ with low conductivity of (Cu, C)-1201 films indicates the presence of extrinsic defects such as grain boundaries. The absence of saturation of $T_{c}$ with an increase of TCR indicates doping level of the (Cu, C)-1201 films in this study should be in between under-doped to optimally-doped states. They suggest there would be some room for further increases of $T_{c}$. |
| Related Links | http://iopscience.iop.org/article/10.1088/1742-6596/150/5/052108/pdf |
| ISSN | 17426588 |
| e-ISSN | 17426596 |
| DOI | 10.1088/1742-6596/150/5/052108 |
| Journal | Journal of Physics: Conference Series |
| Issue Number | 5 |
| Volume Number | 150 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2009-03-01 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics: Conference Series Condensed Matter Physics Contact Resistance Thin Film Grain Boundary Temperature Coefficient of Resistance Pulsed Laser Deposition |
| Content Type | Text |
| Resource Type | Article |
| Subject | Physics and Astronomy |
