Abstract
The compound PrBa2Cu3O7 −y is not superconducting while most other RBa2Cu3O7 −y (R=rare earth) compounds exhibit superconductivity in the 90K range. The system PrBa2 −x Pr x Cu3O7 −x has been prepared to study the effect of excess Pr at the Ba site on the structure, resistivity and magnetic behaviour of this system. It is observed that single-phase compounds in the above series form forx=0·8—that is up to the composition Pr1·8Ba1·2Cu3O7 −y . While stoichiometric PrBa2Cu3O7 −y is orthorhombic, the compounds with excess Pr show tetragonal structure. Four-probe dc resistivity measurements show that all the single-phase compounds in the above series do not exhibit superconductivity and are semiconducting down to 12 K. Magnetic susceptibility measurements reveal deviation from Curie-Weiss behaviour starting at a characteristic temperature, which is taken to be the ordering temperature (T N ) of the Pr moments. BothT N and overall resistivity decrease with increasingx and may have a common origin.
Similar content being viewed by others
References
Cook D Wet al 1990 Preprint
Dhar S K, Malik S K and Vijayaraghavan R 1981J. Phys. C14 L321
Dunlap B Det al 1987J. Magn. Magn. Mater. 68 L139
Jee C-S, Kebede A, Nichols D, Crow J E, Mihalisin T, Myer G H, Perez I, Salomon R E and Schlottmann P 1989Solid State Commun. 69 379
Kang J Set al 1988Proceedings of 18th Rare earth Conference (to appear)
Li W-H, Lynn J W, Skanthakumar S, Clinton T W, Kebede A, Jee C -S, Crow J E and Mihalisin T 1989Phys. Rev. B40 5300
Maple M B, Ferreira J M, Hake R R, Lee B W, Neumeier J J, Seaman C L, Yang K N and Zhou H 1988Proceedings of 18th Rare earth Conference (to appear)
Murphy D W, Sunshine S, van Dover R B, Cava R J, Batlogg B, Zahurak S M and Schneemeyer L F 1987Phys. Rev. Lett. 58 1888
Neukirch U, Simmons C T, Sladeczek P, Laubschat C, Strebel O, Kaindl G and Sarma D D 1988Europhys. Lett. 5 567
Soderholm L and Goodman G L 1989J. Solid State Chem. 81 121
Tomy C V, Nagarajan R, Malik S K, Adroja D T, Soni N C and Ram Prasad 1988Solid State Commun. 68 531
Yang K N, Lee B W, Maple M B and Laderman S S 1989Appl. Phys. A46 229
Zhang K, Dabrowski B, Segre C U, Hinks D G, Schuller I K, Jorgensen J D and Slaski M 1987J. Phys. C20 1935
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Malik, S.K., Tomy, C.V., Prasad, R. et al. Crystal structure and resistivity studies on PrBa2 −x Pr x Cu3O7 −y oxide system. Bull. Mater. Sci. 14, 943–947 (1991). https://doi.org/10.1007/BF02747455
Issue Date:
DOI: https://doi.org/10.1007/BF02747455