Evidence of antiferromagnetic ordering of Cu2+ spins in non-superconducting Bi-2212

✍ Scribed by A.H. Moudden; L. Vasiliu-Doloc; N. Blanchard; G. Collin; J. Hammann

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 154 KB
• Volume: 235-240
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(94)92036-2

✦ Synopsis

Using neutron scattering we have investigated the magnetic correlations in single crystals with the nominal composition Bi2Sr2PrCu2Os+6 • We have shown that while the Pr moment remains paramagnetic down to 1.3K, a long-range, three-dimensional, antiferromagnetic ordering of the Cu +2 spins occurs below a N~el temperature T~ ~ 350K. Assuming collinear spins, Lb.e exptrimental data are well accounted for by a model consisting of two antiferromagnetic, YBa~Cu306+~ -type CuO2 bdayers, having a threedimensional coupling of the La2Cu04 -type, i.e. the spins are parallel to the [100] direction and the magnetic propagation vector is ~'-(0, 1, 0). The resulting ordered moment per Cu mn measured at 10K is found to be mcu -(0.7 ± 0.1)#B, compatible with a system of hghtly doped CuO2 layers.