Magnetic pair-breaking effects: Moment formation and critical doping level in superconducting La1.85Sr0.15Cu1−xAxO4 systems (A=Fe,Co,Ni,Zn,Ga,Al)

Gang Xiao; Marta Z. Cieplak; J. Q. Xiao; C. L. Chien

doi:10.1103/PhysRevB.42.8752

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Magnetic pair-breaking effects: Moment formation and critical doping level in superconducting La1.85Sr0.15Cu1−xAxO4 systems (A=Fe,Co,Ni,Zn,Ga,Al)

Gang Xiao, Marta Z. Cieplak, J. Q. Xiao, C. L. Chien

DOI 10.1103/PhysRevB.42.8752 · Physical Review B

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Abstract

We have conducted a systematic study on the effect of Cu-site doping in La1.85Sr0.15CuO4 system. The relations between Tc and doping level as well as the critical doping levels xc have been determined accurately for the Fe-, Co-, Ni-, Zn-, Ga-, and Al-doped systems. Every dopant either carries an intrinsic magnetic moment or induces a net moment on the Cu-O2 plane. The size of the moment is correlated with the suppression of superconductivity, consistent with the magnetic-pair-breaking effect. The ground states of the dopants have also been determined.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38	Pressure not reported	midpoint
La1.85Sr0.15CuO4 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	38	Pressure not reported	onset