Back to Search
Start Over
Vortex Response and Critical Fields observed via rf penetration depth measurements on the superconductor YNi_2B_2C
- Publication Year :
- 1996
- Publisher :
- arXiv, 1996.
-
Abstract
- Measurements of the rf penetration depth \lambda(T,H,\theta ) are used to study the superconducting order parameter, vortex dynamics in the mixed state and delineate critical fields in the borocarbide superconductor YNi_2B_2C. The lower critical field has an anomalous T dependence, H_{c1}(T)=1.12[1-(T/T_c)] kOe, which is however consistent with independent superfluid density measurements at microwave frequencies. The vortex response is dominated by viscous flux flow, indicative of extremely weak pinning, and is parametrized by a field scale H_{c2,eff}. The angular dependence of the vortex contribution \lambda(\theta) is in good agreement with the Coffey-Clem model. Structure is seen in the depairing transition in the vicinity of the upper critical field, with the existence of well-defined critical fields H_{c2a}, H_{c2b} and H_{c2c}, with the vortex field scale H_{c2,eff} closest to H_{c2b}. Overall the measurements indicate that YNi_2B_2C has a rich and unusual field dependence of its transport parameters.<br />Comment: 6 LaTeX pages with 6 EPS figures, uses RevTeX, multicol and epsf. One figure bitmapped. Better PS file available at http://sagar.physics.neu.edu/preprints.html Submitted to Physica C
- Subjects :
- Physics
Superconductivity
Condensed matter physics
Field (physics)
Condensed Matter - Superconductivity
Energy Engineering and Power Technology
Order (ring theory)
FOS: Physical sciences
Vorticity
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Vortex
Superfluidity
Superconductivity (cond-mat.supr-con)
Condensed Matter::Superconductivity
Electrical and Electronic Engineering
Penetration depth
Critical field
Subjects
Details
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....797b4acde4677950c15117bc36c31dc7
- Full Text :
- https://doi.org/10.48550/arxiv.supr-con/9602003