Effect of Ga substitution on the superconducting properties of the electron-doped system: Nd-Ce-Cu-O
I. Felner, U. Yaron, Y. Yeshurun, E. R. Yacoby, Y. Wolfus
DOI 10.1103/PhysRevB.40.11366 · 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 are reporting on results of dc magnetization measurements of the new electron-doped Nd2−xCexCu1−yGayO4 superconductors. The effect of Ga3+ on Tc is similar to that of Ce4+, although the extra electron of the former comes from the Cu-O planes. For example, for x=0.12 the undoped compound (y=0) is not superconducting; but by the addition of Ga (y=0.03), the material becomes superconducting at Tc=20 K, and the Meissner fraction and the critical current density are improved compared to Nd1.85Ce0.15CuO4. The irreversibility line Tirr(H) for doped and undoped samples scales with the applied field as Hp, with p≃0.6, but for the Ga-doped sample it is pushed to higher temperatures.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd1.85Ce0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 21 | Pressure not reported | onset |
| Nd1.85Ce0.15Cu0.99Ga0.01O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 19 | Pressure not reported | onset |
| Nd1.85Ce0.15Cu0.98Ga0.02O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16 | Pressure not reported | onset |
| Nd1.85Ce0.15Cu0.96O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 17 | Pressure not reported | onset |
| Nd1.87Ce0.13Cu0.98Ga0.02O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | onset |
| Nd1.88Ce0.12Cu0.97Ga0.03O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 20 | Pressure not reported | onset |
| Nd1.88Ce0.12Cu0.97Ga0.03O4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 12 | Pressure not reported | zero_resistance |
Similar papers
Anomalous Transport Properties in Superconducting Nd1.85Ce0.15CuO4±δ
similarity 0.96Wu Jiang et al.
Source status unknown — claims are unverified
Crystal-field excitations in Nd2CuO4, Pr2CuO4, and related n-type superconductors
similarity 0.95A. T. Boothroyd et al.
Source status unknown — claims are unverified
Effect of Ce doping on the Cu charge in the electron superconductor Nd2−xCexCuO4
similarity 0.95E. E. Alp et al.
Source status unknown — claims are unverified
Infrared and Raman spectroscopy of Nd2CuO4-based superconductors
similarity 0.95M. K. Crawford et al.
Source status unknown — claims are unverified
Comparison of paramagnetic- and nonmagnetic-impurity effects on superconductivity in Nd1.85Ce0.15CuO4
similarity 0.95Jun Sugiyama et al.
Source status unknown — claims are unverified
Is Nd 2−xCe xCuO4 a High-Temperature Superconductor?
similarity 0.95B. Stadlober et al.
Source status unknown — claims are unverified