Superconductivity in Y-Ni-B base compounds
| Autor: | M. Vybornov, W. Perthold, N.M. Hong, P. Hundegger, Herwig Michor, Peter Rogl, G. Hilscher, T. Holubar |
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| Rok vydání: | 1994 |
| Předmět: |
Superconductivity
Materials science Specific heat Condensed matter physics Rietveld refinement Energy Engineering and Power Technology Condensed Matter Physics Ternary alloy Electronic Optical and Magnetic Materials Coherence length Crystallography Magnetization Electrical and Electronic Engineering Critical field Type-II superconductor |
| Zdroj: | Physica C: Superconductivity. 227:85-94 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/0921-4534(94)90360-3 |
| Popis: | Carbon introduced in Y-Ni-B ternary alloy material was shown to stabilise aquaternary compound YNi2B2C which is also responsible for the appearance of superconductivity in Y-Ni-B alloys YNi4−xB1+x. Rietveld refinement of a nearly single-phase material of YNi2B2C confirmed isotypism with the filled ThCr2Si2-type (zB=0.353(1)). Magnetic and specific heat measurements indicate type-II superconductivity in YNi2B2C with a Tc-onset of 15.2 K and a normalised specific heat discontinuity ΔC/γTc=1.57. We present a first estimate of the upper critical field μ0Hc2(0)=3.7 T, the coherence length ξGL=9.4 nm and the Ginzburg-Landau parameter κ=10.5 of this new compound. |
| Databáze: | OpenAIRE |
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