Magnetic order and superconductivity in Y1−xPrxBa2Cu3O7

I. Felner; U. Yaron; I. Nowik; E. R. Bauminger; Y. Wolfus; E. R. Yacoby; G. Hilscher; N. Pillmayr

doi:10.1103/PhysRevB.40.6739

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Magnetic order and superconductivity in Y1−xPrxBa2Cu3O7

I. Felner, U. Yaron, I. Nowik, E. R. Bauminger, Y. Wolfus, E. R. Yacoby, G. Hilscher, N. Pillmayr

DOI 10.1103/PhysRevB.40.6739 · Physical Review B

T1

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Abstract

The system Y1−xPrxBa2Cu3−yFeyOz, with x=0 to 1, y=0 and 0.3, and z=6 and 7, has been studied by ac and dc magnetometry to determine the superconducting phase transition temperature, Tc, by Fe57 Mössbauer spectroscopy to determine the antiferromagnetic phase transition temperature of the Cu(2) site, TN, and by specific-heat measurements to determine γ and the antiferromagnetic ordering temperature of the Pr site, Tn. Tc (x,z=7), TN (x,z=6,7), and Tn (x,z=7) were obtained for x values of 0.0, 0.2, 0.4, 0.6, 0.8, and 1.0. For z=6, TN changes very little with x [TN(0,6)=415 K and TN(1,6)=350 K], but for z=7, TN changes sharply with x [TN(1,7)=325 K, TN(0.6,7)=230 K, and TN(0.4,7)≤35 K]. There is no conclusive evidence for overlap of superconductivity and antiferromagnetism. Tn also decreases strongly with decreasing x, Tn(1,7)=17 K, while Tn(0.4,7)≤2.5 K. The specific-heat measurements show large linear temperature terms. The slope γ increases strongly with x and with the introduction of the Fe probe.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	91	Pressure not reported	unknown
Y0.8Pr0.2Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	67	Pressure not reported	unknown
Y0.6Pr0.4Ba2Cu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	35	Pressure not reported	unknown
YBa2Cu2.7Fe0.3O7.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	69	Pressure not reported	unknown
Y0.8Pr0.2Ba2Cu2.7Fe0.3O7.1 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	25	Pressure not reported	unknown