Influence of structural parameters on Tc in superconducting RNi2B2C compounds
D. R. Sánchez, H. Micklitz, E. M. Baggio-Saitovitch
DOI 10.1103/PhysRevB.71.024509 · Physical Review B
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Abstract
The superconducting transtition temperature Tc in nonmagnetic Lu1−xLaxNi2B2C (x⩽0.1) linearly decreases with the structural parameter c′∕a as dTc∕d(c′∕a)=210(20)K. The same decrease of dTc∕d(c′∕a) has been observed for the other nonmagnetic series Lu1−xYxNi2B2C (x⩽0.1) [J. Freudenberger, S. L. Drechsler, G. Fuchs, A. Kreyssig, K. Nenkov, S. V. Shulga, K.-H. Müller, and L. Schultz, Physica C 306, 1 (1998); J. Freudenbenger, Paarbrechung in Seltenerd-Übergangsmetall-Borkarbiden, Thesis, TU, Dresden, 2000]. The decrease in Tc for the antiferromagnetically (AF) ordered compounds RNi2B2C (R=Dy,Ho,Er,Tm) and for nonmagnetic LuNiBC again scales as [dTc∕d(c′∕a)]=200(10)K. This is a strong indication that in nonmagnetic and AF ordered RNi2B2C as well as RNiBC compounds Tc is determined by c′∕a which is a measure for the deviation of the NiB4 tetrahedra from ideal tetrahedral symmetry.
Source-reported materials — not catalogue approval
| Formula | Reported Tc (K) | Pressure (GPa) | Type |
|---|---|---|---|
| LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.5 | Pressure not reported | onset |
| LuNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.4 | Pressure not reported | onset |
| Lu0.98La0.02Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.2 | Pressure not reported | onset |
| Lu0.98La0.02Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 16.1 | Pressure not reported | onset |
| Lu0.95La0.05Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.3 | Pressure not reported | onset |
| Lu0.95La0.05Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.3 | Pressure not reported | onset |
| Lu0.94La0.06Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 15.1 | Pressure not reported | onset |
| Lu0.94La0.06Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 14.2 | Pressure not reported | onset |
| Lu0.93La0.07Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.6 | Pressure not reported | onset |
| Lu0.93La0.07Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.3 | Pressure not reported | onset |
| Lu0.92La0.08Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13.3 | Pressure not reported | onset |
| Lu0.92La0.08Ni2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | 13 | Pressure not reported | onset |
| LuNiBC Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
| YNi2B2C Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula. | — | Pressure not reported | unknown |
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