Prba2cu3ox Superconducting Powders

We have been preparing polycrystalline PrBa2Cu3Ox (PBCO) to look for superconductivity at 89 K as has been reported in single crystals and thin films. We have found two transitions one at approximate to 90 K and another one at approximate to 12 K in samples, which we are still unable to make single phase. Additional phases include PrBaO3 and BaCuO2. The PBCO samples all appear to have the usual YBCO crystal structure and this is the phase that we believe contains the approximate to 90 K transition. The approximate to 12 K transition is most likely antiferromagnetic ordering of the PrBaO3 phase. We are continuing to investigate sample preparation. Here we present and discuss the superconducting and magnetic properties of our samples.