Neutron scattering study of the antiferromagnetic ordering in YBa2Cu3O6+x powder and single crystal samples

✍ Scribed by P. Burlet; C. Vettier; M.J.G.M. Jurgens; J.Y. Henry; J. Rossat-Mignod; H. Noel; M. Potel; P. Gougeon; J.C. Levet

• Publisher: Elsevier Science
• Year: 1988
• Tongue: English
• Weight: 459 KB
• Volume: 153-155
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/0921-4534(88)90212-2

✦ Synopsis

Neutron diffraction experiments have been performed on powder and single crystal (2x5x2x1.5 mm 3) samples of YBa2Cu306+ x compounds. The reduced compound YBa2Cu306 is found to order antiferromagnetically below T N = 420 ± 10 KoThe magnetic moment is about 0.6 + 0.05 UB on the Cu 2+ sites and aligned perpendicular to the tetragonal c-axis. The magnetic structure is characterized by an in-plane wave vector 1½ ½0i and an antiferromagnetic coupling between the two CuO 2 planes of the unit cell. The addition of oxygen induces only a decrease of T N and the moment value (290 ± 10 K, 0.45 ± 0.05 UB and 245 ± 10 K, 0.28 ± 0.05 UB, for x = 0.25 ± 0.03 and 0.38 ± 0.03, respectively). The long range order disappears abruptly around x = 0.40.