Inhomogeneous Superconducting Behaviour in $$hbox {La}_{5}hbox {Ni}_{2}hbox {Si}_{3}$$ |
| |
| Authors: | M. Falkowski A. Kowalczyk A. M. Strydom M. Reiffers T. Toliński |
| |
| Affiliation: | 1.Institute of Molecular Physics, Polish Academy of Sciences,Poznan,Poland;2.Department of Condensed Matter Physics, Faculty of Mathematics and Physics,Charles University,Prague 2,Czechia;3.Highly Correlated Matter Research Group, Physics Department,University of Johannesburg,Auckland Park,South Africa;4.Faculty of Humanities and Natural Sciences,University of Pre?ov,Pre?ov,Slovakia |
| |
| Abstract: | The superconducting phase transition at (T_mathrm{c} = 2.3) K was observed for the electrical resistivity (rho ({T})) and magnetic susceptibility (chi (T)) measurements in the ternary compound La(_{5}hbox {Ni}_{2}hbox {Si}_{3}) that crystallizes in the hexagonal-type structure. Although a single-phase character with the nominal stoichiometry of the synthesized sample was confirmed, a small trace of the La–Ni phase was found, being probably responsible for the superconducting behaviour in the investigated compound. The magnetization loop recorded at ({T} = 0.5) K resembles a star-like shape which indicates that the density of the critical current can be strongly suppressed by a magnetic field. The low-(T _{rho }(T)) and specific heat ({C}_mathrm{p}({T})) data in the normal state reveal simple metallic behaviour. No clear evidence of a phase transition to any long- or short-range order was found for (C_mathrm{p}(T)) measurements in the T-range of 0.4–300 K. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
