Growth and characterization of superconductive Nd 2‐x Ce x CuO 4‐y  single crystals | Zendy

Jia L. S. | Zendy; Chen X. L. | Zendy; Yang W. | Zendy; Yan X. L. | Zendy

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Growth and characterization of superconductive Nd 2‐x Ce x CuO 4‐y single crystals

Author(s) -

Jia L. S.,

Chen X. L.,

Yang W.,

Yan X. L.

Publication year - 2004

Publication title -

crystal research and technology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.377

H-Index - 64

eISSN - 1521-4079

pISSN - 0232-1300

DOI - 10.1002/crat.200310225

Subject(s) - superconductivity , analytical chemistry (journal) , superconducting transition temperature , crystallography , lattice constant , transition temperature , single crystal , materials science , chemistry , condensed matter physics , physics , diffraction , optics , chromatography

Nd 2‐x Ce x CuO 4‐y single crystals with different x values have been successfully grown by Traveling Solvent Floating Zone method (TSFZ). Electronic properties of Nd 2‐x Ce x CuO 4‐y single crystals with various x have been studied in detail. The results show that superconductivity can be found in crystals with x > 0.1 (0.13‐0.18) directly grown at oxygen‐reduced atmosphere without post‐annealed, while no superconductivity appears in crystals with x < 0.1 at the same atmosphere. It is also found that, the segregation coefficient of Ce is determined to be 0.946 and transition temperature Tc (onset) reaches maximum value of 23.5 K at nominal composition x = 0.165. With further increase of Ce concentration, transition temperature of single crystals declines due to the precipitation of secondary Phases. In addition, the variation of lattice constants of Nd 2‐x Ce x CuO 4‐y single crystals with different x is also given. (© 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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