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Superconductivity in Impurity-Induced Tetragonal YBa<sub>2</sub>(Cu<sub>1-x</sub>Fe<sub>x</sub>)<sub>3</sub>O<sub>7-δ</sub>

99

Citations

12

References

1987

Year

Abstract

Lattice deformation and superconductivity in YBa 2 (Cu 1- x Fe x ) 3 O 7-δ are studied in detail. An orthorhombic to tetragonal phase change is induced at x c ≈0.02. A phase diagram in the temperature-concentration plane clarifies two regions of the tetragonal phase: one is, as known previously, induced mainly by the release of oxygen, and the other by the direct action of impurities. Bulk nature of superconductivity in the novel impurity-induced tetragonal phase is confirmed by magnetic susceptibility measurements.

References

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