| Автор | Yu G Naidyuk |
| Автор | G Behr |
| Автор | N L Bobrov |
| Автор | V N Chernobay |
| Автор | S -L Drechsler |
| Автор | G Fuchs |
| Автор | O E Kvitnitskaya |
| Автор | D G Naugle |
| Автор | K D D Rathnayaka |
| Автор | I K Yanson |
| Дата выпуска | 2009-03-01 |
| dc.description | An general survey of the superconducting (SC) gap study in the title compounds by point-contact (PC) spectroscopy is presented. The SC gap was determined from dV/dI of PCs employing the well-known theory of conductivity for normal metal-superconductor PCs accounting Andreev reflection. The theory was modified by including pair-breaking effects considering the presence of magnetic rare-earth ions. A possible multiband structure of these compounds was also taken into account. The PC study of the gap in the Er-compound (T<sub>N</sub> ≊ 6 K < T<sub>c</sub> ≊ 11K) gives evidence for the presence of two SC gaps. Additionally, a distinct decrease of both gaps is revealed for R Er in the antiferromagnetic (AF) state. For R Tm (T<sub>N</sub> ≊1.5 K < T<sub>c</sub> ≊10.5 K) a decrease of the SC gap is observed below 4–5 K, while for R Dy (T<sub>N</sub> ≊10.5 K > T<sub>c</sub> ≊ 6.5 K) the SC gap has a BCS-like dependence in the AF state. The SC gap for R Ho (T<sub>N</sub> ≊5.2 K < T<sub>c</sub> ≊ 8.5 K) exhibits below T* ≊5.6 K a single-band BCS-like dependence vanishing above T*, where a specific magnetic order occurs. The difference in the SC gap behavior in the title compounds is attributed to different AF ordering. |
| Формат | application.pdf |
| Издатель | Institute of Physics Publishing |
| Копирайт | © 2009 IOP Publishing Ltd |
| Название | The Superconducting gap behavior in the antiferromagnetic Nickel-Borocarbide compounds RNi<sub>2</sub>B<sub>2</sub>C (R=Dy, Ho, Er, Tm) studied by point-contacts spectroscopy |
| Тип | paper |
| DOI | 10.1088/1742-6596/150/5/052178 |
| Electronic ISSN | 1742-6596 |
| Print ISSN | 1742-6588 |
| Журнал | Journal of Physics: Conference Series |
| Том | 150 |
| Первая страница | 52178 |
| Последняя страница | 52181 |
| Выпуск | 5 |
