High-pressure and high temperature synthesis and magnetic characterization of niobio-cuprate Nb0.9Sr2YCu2.1O7.9
2007; American Institute of Physics; Volume: 101; Issue: 9 Linguagem: Inglês
10.1063/1.2711284
ISSN1520-8850
AutoresS. Balamurugan, V. P. S. Awana, E. Takayama‐Muromachi,
Tópico(s)Iron-based superconductors research
ResumoWe have successfully synthesized a 1212-type niobio-cuprate with an ideal formula of NbSr2YCu2O8 by high-pressure and high temperature method. The phase-pure sample was obtained by Nb-poor Cu-rich starting composition, Nb0.9Sr2YCu2.1O7.9, at 6GPa and 1450°C for 2h. The 1212-type niobio-cuprate has tetragonal lattices of a=3.853(1)Å and c=11.547(1)Å (space group P4∕mmm), isostructural to Ru–1212Y phase. From magnetic measurements, it was found that superconductivity and weak ferromagnetism coexisted below ∼17K in the Nb0.9Sr2YCu2.1O7.9 sample, although the superconducting volume fraction is still very small.
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