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  • 1
    Electronic Resource
    Electronic Resource
    Ferroelectric SrxBa1-xNb2O6 optical waveguiding thin films on SiO2-coated Si(100) substrates (1998)
    Springer
    Applied physics 67 (1998), S. 313-316 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Fg; 78.66.-w; 77.84.Dy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: x Ba1-xNb2O6 (x=0.5) films (abbreviated as SBN:0.5) on SiO2-coated Si substrates are potential components for the application of integrated electro-optics devices. SBN:0.5 optical waveguiding thin films on SiO2-coated Si substrates with a very thin MgO diffusion buffer have been successfully prepared by pulsed laser deposition. The as-grown films have a refractive index of 2.28, which is close to that of bulk SBN. X-ray analysis showed that the as-grown films have a single-phase tetragonal tungsten bronze structure. The SBN:0.5 thin films prepared by PLD exhibit favorable ferroelectric and optical waveguiding properties. The composition and the morphology of the films were also examined by XPS and by SEM, respectively. Ferroelectric SBN:0.5 optical waveguiding thin films on SiO2-coated Si substrates are expected to be used in integrated electro-optic devices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050776
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A study of dynamics and chemical reactions in laser-ablated PbTiO3 plume by optical-wavelength-sensitive CCD photography (1998)
    Springer
    Applied physics 67 (1998), S. 331-334 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15I; 52.50J; 42.60K; 34.50R
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 3 (PT) in ambients of oxygen, nitrogen, and argon was studied by using a CCD camera. Two optical filters with different transmittance bands were used to identify the excitation, dissociation, ionization, and, especially, the chemical reactions in the plume. The results show that the atomic processes and chemical reaction mechanisms in the plume formed in active oxygen are very different from those formed in inert argon and nitrogen. It is proposed that the chemical reactions between ablated metal species and ambient oxygen are initiated by the strong shock wave formed during the propagation of the PT plume.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050779
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Pulsed-laser deposition of Ta-doped PZT ferroelectric films for memory applications using conductive oxide La0.25Sr0.75CoO3 and SrRuO3 electrodes (1999)
    Springer
    Applied physics 69 (1999), S. S659 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 77.55.+f; 77.80.Dj; 77.80.Fm
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. New methods for fabricating highly 〈001〉-oriented and complete 〈111〉-textured Pb(Ta0.05Zr0.48Ti0.47)O3 (PTZT) films on Pt/TiO2/SiO2/Si(001) substrates by pulsed-laser deposition have been developed using conductive oxide La0.25Sr0.75CoO3 and SrRuO3 electrodes. The 〈001〉-preferred orientated PTZT ferroelectric capacitor was not subjected to loss of its polarization after 1×1010 switching cycles at an applied voltage of 5 V and a frequency of 1 MHz, and the 〈111〉-textured PTZT film capacitor retains 94.7% of its polarization after 1.5×1010 switching cycles at 5 V and 50 kHz. The PTZT capacitors using these conductive oxide electrodes have low leakage current dominated by Schottky field emission mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051499
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  • 4
    Electronic Resource
    Electronic Resource
    Interaction between laser beam and target in pulsed laser deposition: laser fluence and ambient gas effects (1999)
    Springer
    Applied physics 69 (1999), S. S523 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Fg; 52.40.Mj; 52.40.Na
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The most prominent phenomena on the target surface induced by laser irradiation in pulsed laser deposition is the formation of conical morphologies in the irradiated area. The conical morphologies formed under different laser fluences and the ambient oxygen pressures in KrF laser ablation of Pb(Zr0.53Ti0.47)O3 were studied in detail by using scanning electron microscopy. The results indicate that, depending on the melting extent of the irradiated surface, there are two kinds of cones: one type with well-defined cone tip and cone body and the other having only a cone tip. Pb is very deficient in cone tip. The gas ambient pressure plays a remarkable role in the laser–target interaction. These results are interpreted by employing the impurity shielding mechanism and the surface instability mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051460
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Pulsed laser deposition of perovskite La0.5Sr0.5MnO3/La0.7Sr0.3CoO3 multilayers and their magnetotransport properties (1999)
    Springer
    Applied physics 69 (1999), S. S663 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 75.70.Cn; 72.60.Tg; 73.50.Jt
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Abstract. The perovskite La0.5Sr0.5MnO3-δ/La0.7Sr0.3CoO3-δ (LSMO/LSCO) bilayers and LSMO/LSCO/LSMO trilayers are fabricated by pulsed laser deposition and their magnetic and magnetoresistive properties are investigated. The “waist”-like magnetic hysteresis for both the bilayer and trilayer is explained in terms of the inter-layer exchange coupling model based on the large difference in coercivity between LSCO and LSMO layers. The shrink of hysteresis with temperature is attributed to the temperature dependence of the magnetic crystalline anisotropy and conduction band width W. We observe smoothed remnant resistance of the multilayers over a rather wide temperature range (〉100 K), while the magnetoresistance (MR) is not seriously damaged.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390051500
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    Paper (German National Licenses)
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