| Автор | P Barrett |
| Автор | W G Herrenden-Harker |
| Автор | M G Priestley |
| Автор | E Z da Silva |
| Дата выпуска | 1981-04-01 |
| dc.description | Fluctuations into the superconducting state in (SN)<sub>x</sub> were investigated as a function of temperature and magnetic field. It was found that the fluctuation conductivity as a function of temperature at constant magnetic field for H//b (the fibre axis) was consistent with the dependence of sigma <sub>f</sub>=C((T-T<sub>c</sub>)/T<sub>c</sub>)<sup>-3/2</sup> predicted by da Silva and Gyorffy (SG) (1979) for a single anisotropic fibre. The values of C in zero field, together with the parallel critical field H<sub>c2</sub>//(0) and an estimate of the ratio of the electronic diffusion constants D/sub ////D<sub>perpendicular to </sub> approximately=20, taken from the optical data of Geserich et al. (1977) were used to derive the microscopic parameters in the SG theory. The sample of highest conductivity gave a fibre radius r<sub>0</sub>=74+or-6 AA, D/sub ///=280+or-40 cm<sup>2</sup> s<sup>-1</sup>, and D<sub>perpendicular to </sub>=14+or-2 cm<sup>2</sup> s<sup>-1</sup>. An extension of the SG theory predicted the magnetic field dependence of the fluctuation conductivity to be sigma <sub>f</sub> varies as ((H-H<sub>c2</sub>)/H<sub>c2</sub>)<sup>-3/2</sup>. The authors estimate the superconducting coherence lengths to be xi /sub ///(0) approximately=5500 AA and xi <sub>perpendicular to </sub>(0) approximately=1200 AA, for the above sample. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Название | Superconducting fluctuation conductivity in (SN)<sub>x</sub>: temperature and magnetic field dependence |
| Тип | paper |
| DOI | 10.1088/0305-4608/11/4/017 |
| Print ISSN | 0305-4608 |
| Журнал | Journal of Physics F: Metal Physics |
| Том | 11 |
| Первая страница | 873 |
| Последняя страница | 882 |
| Аффилиация | P Barrett; H.H. Wills Phys. Lab., Univ. of Bristol, Bristol, UK |
| Аффилиация | W G Herrenden-Harker; H.H. Wills Phys. Lab., Univ. of Bristol, Bristol, UK |
| Аффилиация | M G Priestley; H.H. Wills Phys. Lab., Univ. of Bristol, Bristol, UK |
| Аффилиация | E Z da Silva; H.H. Wills Phys. Lab., Univ. of Bristol, Bristol, UK |
| Выпуск | 4 |
