Antiferromagnetic ordering in a 90 K copper oxide superconductor

J. A. Hodges; Y. Sidis; P. Bourges; I. Mirebeau; M. Hennion; X. Chaud

doi:10.1103/PhysRevB.66.020501

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Antiferromagnetic ordering in a 90 K copper oxide superconductor

J. A. Hodges, Y. Sidis, P. Bourges, I. Mirebeau, M. Hennion, X. Chaud

DOI 10.1103/PhysRevB.66.020501 · Physical Review B

T1

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Abstract

Using elastic neutron scattering, we evidence a commensurate antiferromagnetic Cu(2) order (AF) (TN∼330 K, μ∼0.14 μB) in the superconducting (SC) high-Tc cuprate YBa2(Cu1−yCoy)3O7+δ (y=0.013,Tc=93 K). We find that the spin excitation spectrum is still dominated by a magnetic resonance peak at 41 meV as in the Co-free system, but with a reduced spectral weight. The substitution of Co leads to a state where AF and SC cohabit at a microscopic scale, without any strong interference.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
YBa2(Cu1-yCoy)3O7+δ Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	93	Pressure not reported	onset
YBa2Cu3O6+x Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
Bi2Sr2CaCu2O8 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown