Magnetic torque study of the temperature-dependent anisotropy parameter in overdoped superconducting single-crystal YBa2Cu3O7
S. Bosma, S. Weyeneth, R. Puzniak, A. Erb, A. Schilling, H. Keller
DOI 10.1103/PhysRevB.84.024514 · 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
An overdoped YBa2Cu3O7 single crystal was studied by SQUID and torque magnetometry in order to investigate the temperature dependence of the anisotropy parameter close to the transition temperature Tc (0.87Tc<T<Tc). Angle-dependent torque measurements were performed and analyzed with the widely used Kogan model [Phys. Rev. B 38, 7049 (1988)] as well as with an extended model by Hao and Clem [Phys. Rev. Lett. 67, 2371 (1991)], taking into account the influence of the vortex cores on the magnetization. Both approaches yield similar results, with an out-of-plane anisotropy parameter around 6.5 which slightly increases with decreasing temperature, and a temperature independent in-plane anisotropy parameter γab=1.12(5).
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | onset |
| YBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 88 | Pressure not reported | onset |
| SmBa2Cu3O7-δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| MgB2 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
Similar papers
Doping dependence of the gap anisotropy of the high-temperature YBa2Cu3O7−δ superconductor
similarity 0.97K. Nakayama et al.
Source status unknown — claims are unverified
Temperature dependence of the upper critical field of type-II superconductors from isothermal magnetization data: Application to high-temperature superconductors
similarity 0.97I. L. Landau & H. R. Ott
Source status unknown — claims are unverified
Magnetism and critical fields in the high-Tc superconductors YBa2Cu3O7−xSx(x=0, 1): An ESR study
similarity 0.96Carlos Rettori et al.
Source status unknown — claims are unverified
Magnetic-field dependence of the critical dynamics of a superconducting YBa2Cu3O7−δ detwinned single crystal
similarity 0.96Jin-Tae Kim et al.
Source status unknown — claims are unverified
Temperature dependence of the lower critical field of high-Tc superconducting crystals near Tc
similarity 0.96F. Mrowka et al.
Source status unknown — claims are unverified
Magnetic properties of Y-Ba-Cu-O superconductors
similarity 0.96T. R. McGuire et al.
Source status unknown — claims are unverified