Space group and chemical analysis of Y2BaCuO5-x by convergent beam electron diffraction and x-ray energy-dispersive spectroscopy

Mansfield, John F.; Chevacharoenkul, Sopa; Kingon, Angus I.
September 1987
Applied Physics Letters;9/28/1987, Vol. 51 Issue 13, p1035
Academic Journal
The results of analyses of chemistry and microstructure of one of the secondary phases commonly observed in samples of the new high-temperature superconductors are reported. The crystal structure has been examined by convergent beam electron diffraction and is confirmed to be orthorhombic, with space group Pbnm and lattice parameters a=0.71 nm, b=1.22 nm, and c=0.56 nm. The stoichiometry of the metal components was found by x-ray energy-dispersive spectroscopy to be Y1.0Ba0.5Cu0.5, which leads us to postulate that this phase is Y2BaCuO5-x.


Related Articles

  • Microstructural characterization of Nb[sub 3]Al ultrafine multifilamentary superconducting wire.... Wadayama, Y.; Suzuki, T.; Aihara, K.; Tada, N.; Kamata, K.; Sakai, S.; Inoue, K. // Applied Physics Letters;7/22/1991, Vol. 59 Issue 4, p473 

    Presents the microstructural characterization of the longitudinal cross section of Nb[sub 3]Al wires fabricated by an Nb tube composite process. Observation of the Al[sub 5] superconducting compound and unreacted fibrous Nb; Average Al concentration at the Al[sub 5] grain.

  • Stability of growing front of YBa[sub 2]Cu[sub 3]O[sub x] superconductor in the presence of Pt.... Kozlowski, Gregory; Svobodny, Thomas // Applied Physics Letters;7/10/1995, Vol. 67 Issue 2, p288 

    Investigates the microstructures of textured yttrium barium copper oxide superconductors. Application of scanning electron and metallurgical microscopy; Synthesis of the samples under a residual thermal gradient; Use of the zone-melting method for the fabrication of superconducting bars.

  • The microstructure and critical current density of NB-48 wt. % Ti superconductor with very high alpha-Ti precipitate volume and very high critical current. Chernyi, O. V.; Andrievskaya, N. F.; Ilicheva, V. O.; Storozhilov, G. E.; Lee, P. J.; Squitieri, A. A. // AIP Conference Proceedings;2002, Vol. 614 Issue 1, p883 

    Superconducting strand has been fabricated with the highest yet recorded 5 T, 4.2 K critical current density for conventionally processed Nb-Ti. Starting from an ingot of high homogeneity Nb-48 wt.%Ti alloy, both mono- and multifilamentary superconductors were fabricated using multiple heat...

  • XPS depth profiling studies of YBCO layer on buffered substrates. Barnes, Paul N.; Mukhopadhyay, Sharmila; Nekkanti, Rama; Haugan, Tim; Biggers, Rand; Maartense, Iman // AIP Conference Proceedings;2002, Vol. 614 Issue 1, p614 

    XPS studies of a typical YBCO coated conductor architecture were conducted to investigate the chemical and microstructural profiles. The detailed XPS depth profiling study was performed on one sample (YBCO/CeO2/YSZ/CeO2/Ni) of coated conductor. The chemical depth profiling involved bombarding a...

  • High critical current density in grain-oriented bulk YBa2Cu3Ox processed by partial melt growth. Shi, Donglu; Fang, M. M.; Akujieze, Justin; Xu, Ming; Chen, J. G.; Segre, Carlo // Applied Physics Letters;12/10/1990, Vol. 57 Issue 24, p2606 

    A uniform grain-oriented microstructure was developed in 50-mm-long bar samples of bulk YBa2Cu3Ox prepared by a partial melt growth process. In sharp contrast to previous reports, the textured products contained only small amounts of second phases. The samples were dense and nearly free of...

  • Directional isothermal growth of highly textured Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub y]. Holesinger, T.G.; Miller, D.J. // Applied Physics Letters;8/16/1993, Vol. 63 Issue 7, p982 

    Examines the use of an oxygen gradient to produce large bulk forms of Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub y] (2212) superconductors with highly textured microstructures. Transition temperatures of the produced materials; Solidification of an oxygen-deficient melt at constant temperature;...

  • Improved irreversibility behavior and critical current density in MgB[sub 2]-diamond nanocomposites. Zhao, Y.; Cheng, C.H.; Rui, X.F.; Zhang, H.; Munroe, P.; Zeng, H.M.; Koshizuka, N.; Murakami, N. // Applied Physics Letters;10/6/2003, Vol. 83 Issue 14, p2916 

    MgB[sub 2]-diamond nanocomposite superconductors have been synthesized by addition of nanodiamond powder. Microstructural analysis shows that the nanocomposite superconductor consists of tightly packed MgB[sub 2] nanograins (∼50–100 nm) with highly dispersed and uniformly distributed...

  • Microstructures of YBa2Cu3O7-x superconducting thin films grown on a SrTiO3(100) substrate. Chen, C. H.; Kwo, J.; Hong, M. // Applied Physics Letters;3/7/1988, Vol. 52 Issue 10, p841 

    We report microstructures of superconducting YBa2Cu3O7-x thin films epitaxially grown on a SrTiO3(100) substrate. Transmission electron microscopy studies reveal epitaxial, highly ordered grains ∼5000 Å in size for both types of films with either the a or c axis perpendicular to the...

  • Microstructure of epitaxial YbBa2Cu3O7 superconducting films grown by a new liquid-gas-solidification technique. Chen, C. H.; Chen, H. S.; Liou, S. H. // Applied Physics Letters;12/5/1988, Vol. 53 Issue 23, p2339 

    We have studied the microstructures of epitaxial YbBa2Cu3O7 superconducting films grown on SrTiO3[100] and [110] substrates by a new liquid-gas-solidification processing technique. Films grown on SrTiO3[100] and [110] substrates are epitaxially oriented with [001] and [110] axes normal to the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics