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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis of 5-chloro-3'-nitro-4'-substituted salicylanilides, a new series of anthelmintic and antimicrobial agents (1977)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 20 (1977), S. 826-829 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00216a017
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  • 2
    Electronic Resource
    Electronic Resource
    Synthesis of substituted 1-hydroxy-2-naphthanilides as potential cestodicidal agents (1978)
    s.l. : American Chemical Society
    Journal of medicinal chemistry 21 (1978), S. 1178-1181 
    Details
    ISSN: 1520-4804
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jm00209a020
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  • 3
    Electronic Resource
    Electronic Resource
    A modified high-temperature cell (up to 3300 K) for use with a cubic press (1996)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 67 (1996), S. 3679-3682 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A high temperature-high pressure pyrophyllite cell with a graphite heater has limitations when temperature exceeds ∼2100 K. A conventional cell used with the cubic anvil high pressure apparatus has been modified to reach ∼3300 K. The heater power versus temperature calibration curve has been established using Pt–Pt10%Rh thermocouple up to 1900 K. For calibration above 1900 K, the heater powers required to initiate melting in Al2O3, Y2O3, and TiB2, and decomposition of α-SiC have been determined. The melting (or decomposition) of the specimens has been detected by examining the microstructure of the specimens recovered after pressure-temperature treatment. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1147135
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  • 4
    Electronic Resource
    Electronic Resource
    Orthorhombic to tetragonal phase transition in Y1Ba2Cu3O7−x (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 63 (1988), S. 5805-5808 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Quenching experiments were performed to study the orthorhombic to tetragonal phase transition in Y1Ba2Cu3O7−x. The quenched and unquenched specimens were characterized by x-ray diffraction and optical microscopy. The phase transition temperature was found to be dependent on the environment of the sealed specimens during quenching, and could be as high as 1173 K (900 °C). The phase transition is suggested to be of second order.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.340319
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  • 5
    Electronic Resource
    Electronic Resource
    Observation of intermittent structures associated with the low-frequency turbulence in toroidal magnetized plasma (1994)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 1 (1994), S. 2926-2930 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two-dimensional structures in a plane perpendicular to the magnetic field, of the low-frequency turbulence in a toroidal plasma, have been studied. The probability distribution functions for the density and the potential fluctuations are found to deviate from the Gaussian distribution significantly indicating intermittency in the turbulence and formation and destruction of the coherent structures in the strongly turbulent state. The presence of such short-lived structures has been established, on a statistical basis, by means of conditional averaging of the fluctuation amplitudes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.870532
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  • 6
    Electronic Resource
    Electronic Resource
    In-situ patterned laser deposition of high-Tc Y-Ba-Cu-O superconducting thin films (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 3448-3451 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Reliable critical current density measurements have been sucessfully carried out on superconducting thin films which were in situ patterned during the laser deposition process. This method does not require cumbersome wet etching or post-ion-implantation patterning steps for measuring transport critical current densities of thin films. Epitaxial films of YBa2Cu3O7 on (100) SrTiO3 and (100)yttria-stabilized ZrO2 (YSZ) were fabricated at low processing temperatures (500–650 °C) by the excimer laser ablation technique in an oxygen ambient coupled with a dc bias voltage of +300 V on an interposing ring between the substrate and the target. Steel masks of various lateral dimensions were placed close to the substrate to generate various patterns. The superconducting properties obtained at the masked and unmasked areas of the film were similar and reproducible. The thickness and width of the mask have been found to be critical in controlling the superconducting properties of the patterned thin films. Excellent quality superconducting thin films were obtained in the patterned areas. The critical temperature of the films was found to lie in the range of 88–90 K, and the best critical current density values (at 77 K and zero magnetic field) of 1.0×106, 5.0×106, and 6.5×106 A/cm2 were obtained for films deposited on (100) YSZ, (100) SrTiO3 , and (100) LaAlO3 , respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345332
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  • 7
    Electronic Resource
    Electronic Resource
    In situ fabrication of epitaxial YBa2Cu3O7 films on lattice-mismatched (100) YS-ZrO2 substrates by the pulsed laser evaporation method (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 3452-3455 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The formation of good quality epitaxial c-axis-perpendicular YBa2 Cu3 O7 superconducting thin films on (100) yttria-stabilized-zirconia (YSZ) substrates in the temperature range of 550–650 °C by a biased laser deposition method is reported. However, below 550 °C, the epitaxial quality of the films decreased appreciably with corresponding changes in the superconducting properties. For temperatures much below the critical temperature, the critical current density showed a linear variation with temperature, with a value of 1.0×106 A/cm2 at 77 K and zero magnetic field. Because of the lattice mismatch between the substrate and the film, the interface was found to be highly strained in the presence of a large number of defects. The epitaxial nature and the crystalline quality of the films were determined by a number of techniques including Rutherford backscattering/channeling, electron channeling, cross-section transmission electron microscopy (TEM), and x-ray diffraction techniques. Rutherford backscattering channeling showed a minimum channeling yield of about 18%–25% for films deposited at and above 550 °C. Cross-section TEM and x-ray diffraction revealed the following thin film and substrate relationships: [001]film (parallel)[001]YSZ and [110]film (parallel)[100]YSZ. The electron channeling pattern taken from a large area confirmed the epitaxial relationship. The lattice parameters mismatch in this orientation has been found to gives rise to stresses near the interface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.345333
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  • 8
    Electronic Resource
    Electronic Resource
    In situ processing of epitaxial Y-Ba-Cu-O high Tc superconducting films on (100) SrTiO3 and (100) YS-ZrO2 substrates at 500–650 °C (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 54 (1989), S. 2271-2273 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the formation of excellent quality epitaxial YBa2Cu3O7 films on (100) SrTiO3 and (100) ZrO2 (yttria stabilized) substrates in the temperature range of 500–650 °C by XECl excimer laser ablation in a 0.2 Torr oxygen ambient. By applying a dc bias voltage of +300 V to an interposing ring, we were able to reduce the substrate temperatures from 650 to 500 °C for obtaining epitaxial films. The quality of the epitaxial films was found to decrease with temperature, particularly below 550 °C. The thickness of the superconducting films was varied from 500 to 5000 A(ring) with superconducting transition temperatures Tc (zero resistance) varying from 87 to 90 K for 650 °C deposits. The critical current density Jc of films was found to vary linearly with temperature with values of (zero magnetic field at 77 K) 5.0×106 and 1.0×106 for films deposited at 650 °C on (100) SrTiO3 and (100) yttria-stabilized zirconia substrates, respectively. X-ray diffraction, transmission electron microscopy, electron channeling patterns, and Rutherford backscattering (RBS)/channeling showed excellent epitaxial quality of films on both substrates with best values of minimum ion channeling yield of 3.5% on (100) SrTiO3 substrates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101520
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  • 9
    Electronic Resource
    Electronic Resource
    Thin-film high Tc superconductors prepared by a simple flash evaporation technique (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 53 (1988), S. 1663-1664 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of Bi-Sr-Ca-Cu-O and Tl-Ba-Ca-Cu-O have been deposited on single-crystal MgO substrates by a simple flash evaporation technique. Small pellets of the superconducting compound were formed by standard techniques, then evaporated to completion on the MgO substrates using an electron beam. The best films show an onset of superconductivity at approximately 110 K and zero resistance by 78 K. X-ray diffraction measurements show the films to be tetragonal with nominal lattice parameters of a=3.85 A(ring) and c=30.66 A(ring). The x-ray data also show the films to be highly textured with the metal-oxide planes parallel to the substrate surface.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.100468
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  • 10
    Electronic Resource
    Electronic Resource
    Correlation of "twins'' observed by optical microscopy and transmission electron microscopy in YBa2Cu3O7−x superconductors (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 669-671 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: By using transmission electron microscopy and optical microscopy on the same specimens, the patterns of light- and dark-contrast lines seen in reflected polarized light were shown to be an interference pattern due to the variable spacing of suboptical microtwins. These microtwins are mostly [110] reflection twins. The [110] twinning was observed to be cyclic and occasionally pseudotetragonal because of the progressive cycling of contact twin domains. Within a domain, and occasionally in a whole grain, the [110] reflection twins occurred as polysynthetic lamellae. The morphology of the domain structure can be explained from the theory of martensitic transformation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99370
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