Effect of Ni and Zn substitution on magnetic properties of the high-Tc superconductor GdBa2Cu3O7−y
Chin Lin, Zun-Xiao Liu, Jian Lan
DOI 10.1103/PhysRevB.42.2554 · Physical Review B
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Abstract
Magnetic properties of GdBa2(Cu1−xMx)3O7−y were studied with M=Ni, Zn and x=0, 0.025, 0.050, 0.075, and 0.100. All samples are single phase with orthorhombic oxygen-deficient perovskite structure. Substitution of Cu by Ni or Zn not only depresses superconductivity but also reduces the antiferromagnetic ordering temperature TN of Gd ions, suggesting an interaction between Gd ions and the Cu-O plane. The effect of Ni on TN is the same as that of Zn. For x=0.10, both Ni- and Zn-substituted compounds are nonsuperconducting. A deviation from Curie-Weiss behavior is observed at about 8 K for these nonsuperconducting compounds. A possible explanation is discussed.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| GdBa2Cu3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 91 | Pressure not reported | onset |
| GdBa2(Cu0.975Ni0.025)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 79 | Pressure not reported | onset |
| GdBa2(Cu0.950Ni0.050)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 71 | Pressure not reported | onset |
| GdBa2(Cu0.925Ni0.075)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 65 | Pressure not reported | onset |
| GdBa2(Cu0.975Zn0.025)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 54 | Pressure not reported | onset |
| GdBa2(Cu0.950Zn0.050)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 37 | Pressure not reported | onset |
| GdBa2(Cu0.925Zn0.075)3O7-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 35 | Pressure not reported | onset |
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