Measurement of the magnetic penetration depth of a superconducting MgB2 thin film with a large intraband diffusivity
Jeehoon Kim, N. Haberkorn, Shi-Zeng Lin, L. Civale, E. Nazaretski, B. H. Moeckly, C. S. Yung, J. D. Thompson, R. Movshovich
DOI 10.1103/PhysRevB.86.024501 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
We report the temperature-dependent magnetic penetration depth λ(T) and the superconducting critical field Hc2(T) in a 500-nm MgB2 film. Our analysis of the experimental results takes into account the two-gap nature of the superconducting state and indicates larger intraband diffusivity in the three-dimensional (3D) π band compared to that in the two-dimensional (2D) σ band. Direct comparison of our results with those reported previously for single crystals indicates that larger intraband scattering in the 3D π band leads to an increase of λ. We calculated λ and the thermodynamic critical field Hc≈2000 Oe by employing the gap equations for two-band superconductors. Good agreement between the measured and calculated λ value indicates the two independent measurements, such as magnetic force microscopy and transport, provide a venue for investigating superconducting properties in multiband superconductors.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38.3 | Pressure not reported | zero_resistance |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 38 | Pressure not reported | onset |
Similar papers
Resistive transition process in granular superconducting MgB2 films by analysis and simulation of the generated current noise
similarity 0.95P. Mazzetti et al.
Source status unknown — claims are unverified
Measurement of the magnetic penetration depth of a superconducting MgB thin film with a large intraband diffusivity
similarity 0.95Jeehoon Kim et al. · 2012 · arXiv:1206.4532
Source status unknown — claims are unverified
Coherence lengths and anisotropy in MgB2 superconductor
similarity 0.94A. Dulčić et al.
Source status unknown — claims are unverified
Unusual Hall effect in superconducting MgB2 films
similarity 0.94R. Jin et al.
Source status unknown — claims are unverified
Oscillatory regimes of the thermomagnetic instability in superconducting films
similarity 0.93J. I. Vestgården et al.
Source status unknown — claims are unverified
Penetration depth measurements in MgB2: Evidence for unconventional superconductivity
similarity 0.93C. Panagopoulos et al.
Source status unknown — claims are unverified