Growth of large-domain YBa2Cu3Ox with new seeding crystals of CaNdAlO4 and SrLaGaO4

Shi, Donglu; Lahiri, K.; Hull, J.R.; LeBlanc, David C.; LeBlanc, M. A. R.; Dąbkowski, A.; Chang, Yanfen; Jiang, Ying‐Bing; Zhang, Z.; Fan, Heng

doi:10.1016/0921-4534(95)00174-3

Cited by 50 publications

(19 citation statements)

References 16 publications

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“…Single crystals (SrLaGaO 4 [83], MgO [84]) or textured REBaCuO [85][86][87] materials, having a higher melting point than the material to be textured, can act as seeds in the case of Y123. In particular, Sm123 and to a minor extent Nd123 were found very effective in obtaining epitaxial growth of Y123 during cooling because of their similar lattice parameters.…”

Section: Top Seeding Melt Texturing (Tsmt)mentioning

confidence: 99%

Texturing of high-T_csuperconductors

Desgardin

Monot

Raveau

1999

Supercond. Sci. Technol.

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Most of the potential applications of the high-temperature superconductors require large critical currents, much higher than those obtained using a classical sintering process. This paper reviews different processes and corresponding recent results in the field of texturing high-Tc superconductors in order to align and develop the planes where the current flows easily. Different melt-textured growth methods are discussed from both theoretical and practical viewpoints, and the limitations associated with the diffusion and interface phenomena are introduced. Influence of the process parameters, as well as the microstructure of the precursors and the use of additives in order to enlarge the single domain size and to optimise the superconducting characteristics is discussed. Mechanical texturing and texturing under a magnetic field, as well as combination of both processes, are also considered. Recent results, which appear to be an important breakthrough for the industrial development because of the large crystallization rates are also mentioned.

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Section: Top Seeding Melt Texturing (Tsmt)mentioning

confidence: 99%

Texturing of high-T_csuperconductors

Desgardin

Monot

Raveau

1999

Supercond. Sci. Technol.

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“…Oxide materials of general composition ABCO 4 (where A ¼ Ca, Sr, Ba, B ¼ La, Nd, Pr and C ¼ Al, Ga) with the tetragonal perovskite-related K 2 NiF 4 -type structure are considered promising substrate materials for high-temperature superconducting (HTSc) thin films, elements of thermal radiation receivers and other electronic devices due to their electrochemical and thermal properties and good lattice matching [1][2][3][4][5][6][7][8]. Crystals of high structural quality are required for such applications so the characterisation of crystal lattice defects is of great importance.…”

Section: Introductionmentioning

confidence: 99%

X-ray topography of Ca0.5Sr0.5NdAlO4 single crystal

Malinowska¹,

Lefeld‐Sosnowska²,

Wieteska³

et al. 2008

Journal of Crystal Growth

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a b s t r a c tA Ca 0.5 Sr 0.5 NdAlO 4 single crystal grown by the Czochralski method in the [1 0 0] direction was investigated by means of conventional projection X-ray topography, and by means of synchrotron white beam and monochromatic beam topography.The topographic investigation revealed growth striations with strong black diffraction contrasts distributed periodically in the form of concentric rings, and a significant number of resolved defects. Some of these defects seem to be associated with precipitates, while others form linear diffraction contrasts located perpendicularly to the striation stripes. The last category of defects can be somehow associated with dislocations, but provides much more intense and complex diffraction contrast that can be expected for individual dislocations.A significant lattice deformation associated with striation was revealed with some of the synchrotron topographic methods, particularly back-reflection white beam topography with fine mesh placed behind the crystal and transmission synchrotron section topography, where a characteristic bending of the section image was observed. The transmission section topographs provided also good visibility of segregation fringes in the plane intersected by the beam, corresponding to the subsequent positions of the growth surface.

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“…Taking into account that a number of the new ceramic high T c superconductors are also related to the mentioned structural type [3][4][5][6], compounds adopting this structure appear as specially promising candidates as substrate materials. In fact, some of them have already been assayed for this purpose with good success [7][8][9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%