Stabilization of the tetragonal phase and superconducting behavior in RBa2(Cu1−xFex)3Oy (R=Y,Gd; 0≤x≤0.15)

T. J. Kistenmacher; W. A. Bryden; J. S. Morgan; K. Moorjani; Y- W. Du; Z. Q. Qiu; H. Tang; J. C. Walker

doi:10.1103/PhysRevB.36.8877

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Stabilization of the tetragonal phase and superconducting behavior in RBa2(Cu1−xFex)3Oy (R=Y,Gd; 0≤x≤0.15)

T. J. Kistenmacher, W. A. Bryden, J. S. Morgan, K. Moorjani, Y- W. Du, Z. Q. Qiu, H. Tang, J. C. Walker

DOI 10.1103/PhysRevB.36.8877 · Physical Review B

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Abstract

The structure and superconductivity for YBa2(Cu1−xFex)3Oy and GdBa2(Cu1−xFex)3Oy ceramics (0≤x≤0.15) have been studied by x-ray diffraction and resistivity measurements. In each family of materials (but more rapidly in the Gd ceramics), increasing Fe substitution leads to the stabilization of the tetragonal perovskite structure and suppression of superconductivity, apparently owing to pair breaking by the Fe moments. Anomalous behavior at higher Fe substitution is attributed to the combined influence of Gd and Fe moments.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	95	Pressure not reported	unknown
YBa2(Cu1-xFex)3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.5	Pressure not reported	unknown
GdBa2(Cu1-xFex)3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93.5	Pressure not reported	unknown
YBa2(Cu0.88Fe0.12)3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
YBa2(Cu0.85Fe0.15)3Oy Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	15	Pressure not reported	onset