Magnetic properties of high-oxygen pressure prepared PrBa{sub 2}Cu{sub 3}O{sub 7{minus}y} cuprates
High oxygen pressure annealed PrBa{sub 2}Cu{sub 3}O{sub 7{minus}y} (y{similar_to}0) cuprates were prepared in order to study the effect of oxygen stoichiometric parameter y on the unusual Pr/Cu magnetic properties and/or recently reported superconductivity. The oxygen-rich orthorhombic 123-chain phase is highly unstable under high-oxygen pressure synthesis and decomposes completely in 10 bar pressure. For a smaller 2 bar prepared sample a relatively clean phase was preserved with an oxygen parameter y=0.05, as compared with y=0.11 from a conventional 1 bar flowing oxygen method. No superconductivity can be detected for all high-oxygen pressure prepared samples. Instead, Mott-insulator behavior with anomalous high Pr ordering T{sub N}(Pr)=19K was observed for PrBa{sub 2}Cu{sub 3}O{sub 6.95}. Comparison with other Pr/Ba intersubstituted Pr{sub 1{minus}x}Ba{sub 2{minus}x}Cu{sub 3}O{sub 7{minus}y} cuprates is discussed. {copyright} 2001 American Institute of Physics.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40204095
- Journal Information:
- Journal of Applied Physics, Vol. 89, Issue 11; Other Information: DOI: 10.1063/1.1357859; Othernumber: JAPIAU000089000011007484000001; 324111MMM; PBD: 1 Jun 2001; ISSN 0021-8979
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
Similar Records
Magnetic and transport properties of PrBa{sub 2}Cu{sub 4}O{sub 8-{delta}} prepared at 1 atm oxygen pressure
Suppression of superconductivity in PrBa sub 2 Cu sub 3 O sub 7 : 4 f and conduction-band hybridization effect