Broyage D Y Ba Cu
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- Broyage D Y Ba Cu
Des poudres de composition Cu 80 Fe 20 et Cu 80 (Fe 0,70 Co 0,30) 20 ont été synthétisées par broyage à haute énergie dans un broyeur planétaire. ... Le broyage à partir de poudres d ...
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The chemical compositions of high T c (90 K) and high J c (>10 6 A/cm 2) Y‐Ba‐Cu‐O films on SrTiO 3 (001) substrates were examined. From the relative intensities of the surface and bulk components of the Ba(3d) and Ba(4d) spectra taken at different take‐off angles and different escape depths [using Al ...
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Single-crystal x-ray techniques were used to determine two structures that comprise the Y-Ba- Cu-0 superconductor. A green phase has the orthorhombic Y2BaCu05 structure.
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DOI: 10.1063/1.99751 Corpus ID: 121664309; High critical currents in Y‐Ba‐Cu‐O superconductors @article{Jin1988HighCC, title={High critical currents in Y‐Ba‐Cu‐O superconductors}, author={Sungho Jin and Thomas Henry Tiefel and Richard Curry Sherwood and M. E. Davis and Robert Bruce van Dover and Guenther Wilhelm …
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Nano-composite Y–Ba–Cu–O (YBCO) superconductors containing non-superconducting phase inclusions of composition Y 2 Ba 4 CuMO y (Y-2411), where M = Bi and Ag, embedded in the YBa 2 Cu 3 O 7−δ (Y-123) superconducting matrix have been fabricated successfully. The Y-2411 phase, which typically has dimensions in the range …
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DOI: 10.1063/1.4865216 Corpus ID: 123525090; Large voltage modulation in magnetic field sensors from two-dimensional arrays of Y-Ba-Cu-O nano Josephson junctions @article{Cybart2014LargeVM, title={Large voltage modulation in magnetic field sensors from two-dimensional arrays of Y-Ba-Cu-O nano Josephson junctions}, author={Shane …
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2586 IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, VOL. 15, NO. 2, JUNE 2005 Normal Zone Initiation and Propagation in Y-Ba-Cu-O Coated Conductors With Cu Stabilizer
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Combustion reaction was used to synthesis Al 2 O 3 nanoparticles embedded Y 1-x Al x Ba 2 Cu 3 O 7-δ simultaneously. The effects of Al 2 O 3 nanoparticles with nominal molar mass (x mol) of 0.02, 0.04, 0.06, 0.08 and 0.10 towards the critical current density J C of Y 1-x Al x Ba 2 Cu 3 O 7-δ were verified by magnetic measurement. …
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This letter reports using direct write patterning of high-transition temperature (high-TC) superconducting oxide thin films with a focused helium ion beam to create a sensitive micro superconductor quantum interference device (SQUID) magnetometer with a sensing area of about 100 × 100 μm2. Direct write patterning of high-transition …
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We have fabricated and tested two-dimensional arrays of YBa 2 Cu 3 O 7−δ superconducting quantum interference devices. The arrays contain over 36 000 nano Josephson junctions fabricated from ion irradiation of YBa 2 Cu 3 O 7−δ through narrow slits in a resist-mask that was patterned with electron beam lithography and reactive ion …
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Phase Label(s): Ba 2 Cu 3 Y 0.9 Gd 0.1 O 6.35 ht Structure Class(es): high-T c superconductor family, high-T c superconductor family Property Class(es): …
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Rotating machines with high-temperature superconductors (HTS) usually consist of pole-field magnets having coils wound with Bi-2223 HTS wire. We have successfully used Gd–Ba–Cu–O bulk HTS in pole-field magnets in an axial-gap type rotating machine. These HTS pole-field bulk magnets were assembled in the rotor plate. …
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The dependence of transport critical-current density (Jc) on axial tensile strain (ε) was measured at 76 K and self-magnetic field for YBa2
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Abstract: Here we report for the first time the heteroepitaxial growth of as-deposited superconductive YBa/sub 2/Cu/sub 3/O/sub 7-x/ (YBCO)/Bi/sub 2/Sr/sub 2/CaCu/sub …
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The recently discovered reversible strain effect in Y–Ba–Cu–O (YBCO) coated conductors contrasts with the general understanding that the effect of strain on the critical-current density J c in practical high-temperature superconductors is determined only by crack formation in the ceramic component. Instead of having a constant J c as a …
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Introduction. A ceramic copper-perovskite (La−Ba−Cu−O) with T c around 36 K was discovered in 1986 [1]. La was replaced by a smaller Y in the RE−Ba−Cu−O system one year later, leading to a superconducting transition that increased to 94 K [2].In further research, several superconductor families of the copper-oxygen group were discovered, …
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We report the first successful preparation of thin films of Y‐Ba‐Cu‐O superconductors using pulsed excimer laser evaporation of a single bulk material …
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As a result, we have investigated the Maglev performance of Y–Ba–Cu–O (YBCO) and Gd–Ba–Cu–O (GdBCO) single grain, bulk superconductors under different ambient pressures of 100 kPa, 60 kPa and 20 kPa using a bespoke pressure-controlling platform, in which the superconductors were positioned above a Halbach permanent …
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Epitaxial Y -Ba&Cu-O thin films on MgO deposited by high-pressure reactive magnetron sputtering K. Tanabe,a) D. K. Lathrop, S. E. Russek, and R. A. Buan School a/Applied and Engineering Physics ...
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The production of large (RE)Ba-Cu-O single grains ((RE)BCO), where RE = Y, Gd or Sm, of complex geometries is presently limited by the intrinsic slowness of the grain growth process. Additionally, the shapes achievable using established melt processing are constrained by the small number of post-processing techniques available. These …
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Abstract: A high-speed YBa 2 Cu 3 O 7-δ direct detection system was developed to monitor terahertz picosecond pulses in the time domain. High-T C superconducting thin-film YBa 2 Cu 3 O 7-δ microbridges with critical temperatures of T C = 85 K were embedded into a planar log-spiral antenna to couple the broadband terahertz …
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Article Phase Diagram of the Y-Ba-Cu-O System was published on May 1, 1991 in the journal International Journal of Materials Research (volume 82, issue 5).
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Dynamic levitation performance of Gd–Ba–Cu–O and Y–Ba–Cu–O bulk superconductors under a varying external magnetic field Hengpei Liao 1, Jun Zheng 1, Liwei Jin 1, Huan Huang 1, Zigang Deng 3,1, Yunhua Shi 2 …
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The preparation of single grain, Y-Ba-Cu-O (YBCO) bulk superconductors by top-seeded melt-growth (TSMG) usually involves precursor powders that contain a uniform distribution of the constituent ...
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The d-wave symmetry of the order parameter (OP) [1, 2] is a well defined property of YBa 2 Cu 3 O 7−x (YBCO) that opened up to the fabrication of novel devices, as for instance the so-called π-junctions, in which the minimum of the energy is π-shifted in the Josephson phase [].As a consequence, new physical phenomena, never observed …
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For the practical applications of the melt-tex- tured Y-Ba-Cu-O material, enlargement of the textured 1-2-3 domain or enhancement of the directional growth of the 1-2-3 platelets to the current travel direction is essential. Therefore, many studies have been carried out to clarify the mechanism of the peritectic reaction and the growth of the 1 ...
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Simple die pressing for making artificial holes in single-grain Gd 1.5 Ba 2 Cu 3 O 7−y superconductors; Reliable single grain growth of (RE)BCO bulk superconductors with enhanced superconducting properties; A trapped field of 14.3 T in Y–Ba–Cu–O bulk superconductors fabricated by buffer-assisted seeded infiltration and growth
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We present results on YBa2Cu3O7 single crystals, obtained through systematic intensity measurements, a comparison of X and Q-band spectra, a …
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Y–Ba–Cu–O (YBCO) and Sm–Ba–Cu–O thin films have been used for the first time as heterogeneous seeds to multiseed successfully the melt growth of bulk YBCO in a multiseeded melt growth process. The use of thin film seeds, which may be prepared with highly controlled orientation (i.e., with a well-defined a-b plane and precisely known ...
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