Magnetoresistance of superconducting single crystals of the electron-doped compound Nd2−xCexCuO4−y
M. C. de Andrade, Y. Dalichaouch, M. B. Maple
DOI 10.1103/PhysRevB.48.16737 · Physical Review B
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Abstract
Magnetoresistance measurements on superconducting Nd2−xCexCuO4−y single crystals with Tc varying from 7 to 19 K were made with magnetic fields H applied parallel (H∥c) and perpendicular (H⊥c) to the tetragonal c axis. For H∥c, the resistive superconductive transition curves gradually develop structure at low temperatures and high magnetic fields as Tc decreases. For the crystals with Tc≲11 K, this structure evolves into a double resistive transition with a resistivity maximum near T≊1.1 K, followed by an extremely sharp transition into the superconducting state. In this region, the resistivity exhibits non-Ohmic behavior for low current densities and Ohmic behavior for larger measuring currents. The resistivity for H⊥c does not exhibit any anomalous behavior or a maximum. The irreversibility line inferred from these measurements is sample dependent.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 18 | Pressure not reported | midpoint |
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14 | Pressure not reported | midpoint |
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 11 | Pressure not reported | midpoint |
| Nd2-xCexCuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 7 | Pressure not reported | midpoint |
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