Evidence for antiferromagnetic interactions in the high-temperature superconductor La1.85Sr0.15CuO4−y

P. Gutsmiedl; G. Wolff; K. Andres

doi:10.1103/PhysRevB.36.4043

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Evidence for antiferromagnetic interactions in the high-temperature superconductor La1.85Sr0.15CuO4−y

P. Gutsmiedl, G. Wolff, K. Andres

DOI 10.1103/PhysRevB.36.4043 · Physical Review B

T1

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Abstract

Hyperfine specific-heat measurements in superconducting La1.85Sr0.15CuO4−y strongly suggest the existence of a hyperfine field at the copper nuclei. This field is even larger in undoped and semiconducting La2CuO4 and is compatible with antiferromagnetic order in that compound. We speculate that mobile Cu3+ holes in the Sr-doped samples stabilize a fluctuating antiferromagnetic state which at the same time is superconducting.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.85Sr0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
La1.85Sr0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
La1.85Sr0.15CuO4-y Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
Ba2YCu3O7 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	92	Pressure not reported	unknown