Magnetic properties of high-oxygen pressure prepared PrBa2Cu3O7-y cuprates

Y. H. Lin*, B. N. Lin, Y. X. Lin, Y. Y. Hsu, T. I. Hsu, H. C. Ku


研究成果: 雜誌貢獻會議論文同行評審


High oxygen pressure annealed PrBa2Cu3O7-y (y∼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 TN(Pr) = 19 K was observed for PrBa2Cu3O6.95. Comparison with other Pr/Ba intersubstituted Pr1-xBa2-xCu3O7-y cuprates is discussed.

頁(從 - 到)7484-7486
期刊Journal of Applied Physics
發行號11 II
出版狀態已發佈 - 2001 6月 1
事件8th Joint Magnetism and Magnetic Materials-Intermag Conference - San Antonio, TX, 美国
持續時間: 2001 1月 72001 1月 11

ASJC Scopus subject areas

  • 物理與天文學 (全部)


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