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  • 1
    Electronic Resource
    Electronic Resource
    Suppression of superconductivity by injection of spin-polarized current : The 7th joint MMM-intermag conference on magnetism and magnetic materials (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6774-6776 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A spin polarized current has been injected into high Tc superconductors resulting in a significant reduction in the superconductor's critical current. Such injection may serve as the basis of a new class of superconducting devices for control, switching and amplification. Preliminary results using both Permalloy and CMR materials as injectors are presented. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367763
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  • 2
    Electronic Resource
    Electronic Resource
    In situ pulsed laser deposition of large-area ceramic and multilayer films for applications in industry (1997)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 68 (1997), S. 3872-3876 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: High-quality superconducting films have been deposited onto 2 in. diameter substrates in a large-area pulsed laser deposition (PLD) system incorporating a novel pseudoblackbody radiation heater. A KrF laser (λ=248 nm) was rastered across the radius of a rotating target and a slot in the blackbody heater collected the ablation plume onto a rotating substrate holder. Critical temperatures of 〉90 Kwith critical current densities of 2–4 MA/cm2 were measured across a 2 in. diam YBa2Cu3O7−δ(YBCO) film deposited on an LaAlO3(LAO) substrate. Metal atom concentrations were measured by Rutherford backscattering spectrometry to be nearly stoichiometric and the film thickness uniformity was ±7% about the mean. Purely c-axis orientation was observed in the x-ray diffraction patterns. A multilayer LAO/YBCO film was deposited in situ on an MgO substrate using a large-area target load-lock chamber and exhibited good crystalline quality. YBCO films deposited onto both sides of a 1 in. square by 0.010-in.-thick MgO substrate were patterned and fabricated into a four-channel microwave receiver operating near 10 GHz. The receiver exhibited low loss and good frequency selectivity at 77 K. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1148040
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  • 3
    Electronic Resource
    Electronic Resource
    Time-of-flight study of the ionic and neutral particles produced by pulsed-laser ablation of frozen glycerol (2001)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 90 (2001), S. 3623-3631 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The emitted particles from pulsed-laser ablation (PLA), λ=193 nm and fluence=88–400 mJ/cm2, of frozen glycerol was examined using time-of-flight mass spectrometry. The data are analyzed using supersonic molecular-beam theory and the result is interpreted using a thermal/fluid-dynamic model. Both intact and fragmented glycerol are emitted in the PLA process at all fluences and their concentration ratio is fluence dependent. Fragmentation occurs predominantly at one of the C–C bonds forming CH2–OH (31 amu) and HO–CH2–CH–OH (61 amu). CH3 is produced at the target which requires the protonation of a CH2 fragment. At fluences higher than 250 mJ/cm2, ions are detected. These ions have very high velocity, 〉2000 m/s, and their intensity increases with fluences. PLA is thus not suitable for glycerol transfer under these conditions due to fragmentation. The data show that particle emission proceeds as a simple thermal vaporization process at fluences 〈200 mJ/cm2. Higher fluences will yield a Knudsen layer (KL), which is formed in front of the target surface. For fluences 〉300 mJ/cm2, particles from the KL go through unsteady adiabatic expansion prior to free flight. Models of particle and ion formation and interaction are proposed and discussed. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1398068
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  • 4
    Electronic Resource
    Electronic Resource
    Time-resolved optical microscopy of a laser-based forward transfer process (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 3169-3171 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Matrix-assisted pulsed laser evaporation direct write was investigated by ultrahigh speed optical microscopy. A composite barium–zirconium titanate/α-terpineol layer was irradiated by 355 nm laser pulses with a 150 ns pulse width, and it was observed that material removal does not begin until after the end of the pulse (t〉200 ns) and continues for 1 μs after the irradiation. The desorption plume consists of micron-size particles moving with a velocity of ∼0.2 km/s. The slow response is attributed to the combination of particle absorbers and highly viscous fluid. The ability to form continuous, pinhole-free coatings is due to slow coalescence of the particles. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1372200
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  • 5
    Electronic Resource
    Electronic Resource
    X-ray characterization of extremely high quality (Sr,Ba)TiO3 films grown by pulsed laser deposition (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 1605-1607 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of Sr0.5Ba0.5TiO3 have been grown on MgO (100), SrTiO3 (100), and LaAlO3 (012) substrates using pulsed laser deposition. These films were characterized by a variety of x-ray diffraction techniques. Deposited films exhibited true single crystal morphology. X-ray rocking curves for the (002) reflection as measured by double and triple crystal spectrometers showed unusually narrow full width at half-maximum (FWHM) values of 72 arcsec for films grown on LaAlO3, and 140 arcsec for films deposited onto SrTiO3. The FWHM for films deposited on MgO were significantly broader (∼2500 arcsec). While the quality of the epitaxial films is related to the lattice mismatch between the film and the substrate, extremely well aligned films can be grown on substrates with a relatively large lattice mismatch.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113866
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  • 6
    Electronic Resource
    Electronic Resource
    Enhancement of the vacuum ultraviolet emission from excimer laser-generated plasmas by ambient gas atoms (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 2490-2492 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have measured the axial (z) and radial (x) distribution of the vacuum ultraviolet emission from excimer laser generated aluminum plasmas in vacuum and in 300 mTorr of argon. The ratio of the radiated line intensities (emission in a gas versus vacuum) on the z axis (i.e., x=0) increased exponentially with distance from the target surface for plasmas generated in a 300 mTorr argon ambient. The absolute line intensities increased linearly with the argon pressure and approximately linearly with the ambient gas atomic cross section when other rare gases were substituted. The line intensity radial distribution was broader for plasmas in argon than in vacuum and the magnitude of the effect increased monotonically with z. The spectral data obtained from plasmas in a gas ambient are discussed in terms of the diffusion of plasma electrons in an ionized gas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110458
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  • 7
    Electronic Resource
    Electronic Resource
    Multiple harmonic conversion of pulsed CO2 laser radiation in Tl3AsSe3 (1989)
    Springer
    Applied physics 48 (1989), S. 293-297 
    Details
    ISSN: 1432-0649
    Keywords: 42.65.Cq ; 42.70 ; 42.55.Dk
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The nonlinear material Tl3AsSe3 is used to convert pulsed 9.6 μm CO2 laser radiation into its second, third, fourth and fifth harmonic. Internal (external) conversion efficiencies of 28, 14(6.7), 3.6(3.1), and 0.5(0.3)% from the pump fundamental are achieved in 4.8, 3.2, 2.4, and 1.9 μm generation respectively.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00694184
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