An investigation of the PrBa2Cu3O7−δ system

Ganguli, A. K. ; Rao, C. N. R. ; Sequelra, A. ; Rajagopal, H. (1989) An investigation of the PrBa2Cu3O7−δ system Zeitschrift für Physik B: Condensed Matter, 74 (2). pp. 215-219. ISSN 0722-3277

Full text not available from this repository.

Official URL:

Related URL:


Members of the PrBa2Cu3O7−δ system possessing the orthorhombic structure over a wide range of oxygen stoichiometry (δ=−0.5 to +0.5) have been prepared and characterized. Similar compositions with a tetragonal structure have also been prepared. None of the oxides is superconducting, independent of the structure or stoichiometry. Praseodymium seems to be present to a small extent in the 4+ state in oxygen-excess (negative δ) samples. Orthorhombic PrBa2Cu3O7−δ samples show the presence of twins suggesting that twins arise from orthorhombicity and have no relation to the superconductivity. A neutron diffraction study of a near-stoichiometric sample has shown a disordered orthorhombic structure with 72% occupancy of the 01 (chain) sites and with no interchange between Pr and Ba sites.

Item Type:Article
Source:Copyright of this article belongs to Springer.
ID Code:44681
Deposited On:22 Jun 2011 14:26
Last Modified:03 Jul 2012 05:34

Repository Staff Only: item control page