Magnetic-field-driven x≈1/8 anomaly of superconductivity in La2−x−ySrxMnyCuO4

R. Laiho; J. Salminen; V. Zakhvalinskii

doi:10.1103/PhysRevB.69.052504

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Magnetic-field-driven x≈1/8 anomaly of superconductivity in La2−x−ySrxMnyCuO4

R. Laiho, J. Salminen, V. Zakhvalinskii

DOI 10.1103/PhysRevB.69.052504 · Physical Review B

T1

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Abstract

Dependence of superconducting transition temperature Tc(y) on an applied magnetic field B is investigated in La2−x−ySrxMnyCuO4 with 0<~y<~0.05 and x+y=0.15. A strong linear decrease of Tc with increasing B is observed around the manganese concentration y=0.025, which correlates with the x≈1/8 anomaly in La1.875Sr0.125CuO4. At this value of y the number of Mn3+ pairs, the effective Bohr magneton number peff, and the antiferromagnetic Curie temperature Θ attain their maxima, suggesting that local magnetic order of the Mn system is responsible for the observed effect.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La2-x-ySrxMnyCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La2-xSrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	37	Pressure not reported	unknown
La1.875Sr0.125CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
La1.6-xNd0.4SrxCuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown