Antiferromagnetic order in PrBa2Cu3Ox (x ≅ 6, 7)

Zero and weak transverse field μ+SR measurements on PrBa2Cu3Ox samples with x ≅ 6 and x ≅ 7 show ordered magnetism in both oxygen concentration limits. As expected for equivalent doping (nominally PrBa2Cu3Ox ∝ YBa2Cu3Ox-0.5), neither sample is superconducting. Two muon signals are observed in the x ≅ 6 sample, as in YBa2Cu3O6, but only one (the weaker) has the same local magnetic field as in YBa2Cu3O6. In the x ≅ 7 sample, only one site is observed; its local field is reduced with respect to that of the primary site in YBa2Cu3O6 by a factor roughly consistent with the carrier-density dependence of the Cu ion moment in antiferromagnetic YBa2Cu3Ox. (orig.)