Superconductivity up to 8.9 K in two-layer RNi1−xCuxBC (R = Y, Lu)

A. K. Gangopadhyay; J. S. Schilling

doi:10.1103/PhysRevB.54.10107

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Superconductivity up to 8.9 K in two-layer RNi1−xCuxBC (R = Y, Lu)

A. K. Gangopadhyay, J. S. Schilling

DOI 10.1103/PhysRevB.54.10107 · Physical Review B

T1

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Abstract

In the class of intermetallic compounds of general formula (RC)m(TB)n (R= rare earth, T= transition metal), superconductivity has been reported in several of the single RC layer (m=1 and n=2) compounds, but only in one two-layer (m=2, n=2) system [LuNi1−x(Cu/V)xBC]. We report here the observation of superconductivity in a further two-layer compound YNi1−xCuxBC with Tc as high as 8.9 K. The corresponding LuNi1−xCuxBC system shows an enhancement of Tc up to 6.4 K upon Cu substitution. The principal structural effect of substitution in both systems is an expansion of the tetragonal lattice along the c axis. © 1996 The American Physical Society.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YNi1-xCuxBC Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	8.9	Pressure not reported	onset
LuNi1-xCuxBC Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	6.4	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
YNiBC Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
YNi4BxCy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	12	Pressure not reported	unknown
YPd5B3C0.3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	23	Pressure not reported	unknown