Magnetic ordering of Nd3+ ions in the high-temperature superconductor NbBa2Cu3−xGaxO7−y (0<x≤0.5 and 0.05<y<0.15)
A. M. Niraimathi, E. Gmelin, G. Rangarajan
DOI 10.1103/PhysRevB.51.8503 · Physical Review B
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Abstract
We report on the magnetic specific heats of NdBa2Cu3−xGaxO7−y measured in the temperature range from 0.45 to 100 K. The Ga substitution in the Cu chain sites descreases the superconducting transition temperature drastically. Simultaneously, there is a systematic increase of temperature of magnetic ordering of the Nd3+ ions with Ga substitution. The nature of the magnetic ordering of Nd3+ ion changes from two-dimensional (2D) anisotropic Ising behavior for the oxygen rich compound with zero Ga content to 1D Ising-like for low Ga concentration. With higher Ga concentration, at the advent of nonsuperconductivity, long-range (3D) magnetic ordering is reestablished. The increase of the magnetic interaction between the Nd3+ ions by the substitution of Ga is discussed with the variation of carrier concentration, increase in the Nd-O bond length and with the additional interaction due to Cu-ion ordering in the nonsuperconducting compounds.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| NdBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 90 | Pressure not reported | onset |
| NdBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 89.7 | Pressure not reported | midpoint |
| NdBa2Cu2.99Ga0.01O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81.5 | Pressure not reported | onset |
| NdBa2Cu2.99Ga0.01O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 81.2 | Pressure not reported | midpoint |
| NdBa2Cu2.98Ga0.02O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 82 | Pressure not reported | onset |
| NdBa2Cu2.98Ga0.02O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 80.2 | Pressure not reported | midpoint |
| NdBa2Cu2.97Ga0.03O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 72.5 | Pressure not reported | onset |
| NdBa2Cu2.97Ga0.03O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70.5 | Pressure not reported | midpoint |
| NdBa2Cu2.96Ga0.04O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 70 | Pressure not reported | onset |
| NdBa2Cu2.96Ga0.04O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60.6 | Pressure not reported | midpoint |
| NdBa2Cu2.95Ga0.05O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 63.5 | Pressure not reported | onset |
| NdBa2Cu2.95Ga0.05O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 60 | Pressure not reported | midpoint |
| NdBa2Cu2.94Ga0.06O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 63.5 | Pressure not reported | onset |
| NdBa2Cu2.94Ga0.06O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 56.2 | Pressure not reported | midpoint |
| NdBa2Cu2.93Ga0.07O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 63.5 | Pressure not reported | onset |
| NdBa2Cu2.93Ga0.07O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 52 | Pressure not reported | midpoint |
| NdBa2Cu2.92Ga0.08O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 64.5 | Pressure not reported | onset |
| NdBa2Cu2.92Ga0.08O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 52.4 | Pressure not reported | midpoint |
| NdBa2Cu2.91Ga0.09O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 68.5 | Pressure not reported | onset |
| NdBa2Cu2.91Ga0.09O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50.1 | Pressure not reported | midpoint |
| NdBa2Cu2.90Ga0.10O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 50.5 | Pressure not reported | onset |
| NdBa2Cu2.90Ga0.10O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 42.6 | Pressure not reported | midpoint |
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