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  • PACS: 75.70.Cn; 72.60.Tg; 73.50.Jt  (1)
  • PACS: 81.15.Fg; 81.40.-z; 73.50.-h; 78.20.-e  (1)
  • Recruitment  (1)
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Keywords
  • 1
    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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  • 2
    Electronic Resource
    Electronic Resource
    Pulsed laser deposition of ZnO as conductive buffer layer of (001)-LiNbO3 thin films (1998)
    Springer
    Applied physics 67 (1998), S. 493-497 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 81.15.Fg; 81.40.-z; 73.50.-h; 78.20.-e
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: 1 (LO) mode peak at 579 cm-1, indicating oxygen deficiency in the films. Significant dependence of the electrical property for the films on substrate temperature was shown. The I–V relation of the films exhibited non-ohmic behavior. Whereas the films deposited above 500 °C showed a metal-like property, at a lower substrate temperature semiconducting thin films were achieved. The (001)-oriented LiNbO3/ZnO heterostructure was successfully prepared on quartz fused and (001) sapphire plates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003390050809
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Elastic pressure-volume curves of the respiratory system reveal a high tendency to lung collapse in young pigs (1999)
    Springer
    Intensive care medicine 25 (1999), S. 1140-1146 
    Details
    ISSN: 1432-1238
    Keywords: Key words Animal ; Porcine ; Mechanics ; Compliance ; Elastic recoil ; Recruitment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Objective: To study pressure-volume (P/V) curves over a wide pressure and volume range in pigs.¶Design: Dynamic and static P/V curves (Pdyn/V and Pst/V) and compliance of the respiratory system were studied. The effects of recruitment, positive end-expiratory pressure (PEEP) and body position were analysed.¶Setting: Research animal laboratory.¶Materials: Seven anaesthetised, paralysed and ventilated healthy pigs of 21 kg.¶Measurements: P/V curves up to a pressure of about 40 cmH2O were recorded with a computer-controlled ventilator. Pst/V curves were obtained with the static occlusion method and Pdyn/V curves during an insufflation at a low, constant flow rate.¶Results: Pdyn/V recording showed a complex pattern. During the insufflation compliance increased, fell, increased and fell again. A 2nd ¶Pdyn/V recording immediately following the 1st one was displaced towards higher volumes and showed only one maximum of compliance. The difference between the two curves reflected: (1) lung collapse during a period of 5 min of ventilation at zero end-expiratory pressure (ZEEP) following a recruitment manoeuvre, (2) recruitment during the measurement of the 1st Pdyn/V curve. These observations were similar in the supine and in the left lateral position. After ventilation at PEEP, 4 cmH2O, the signs of collapse and recruitment were reduced. It was confirmed that PEEP offers a partial protection against collapse. Pst/V curves showed higher volumes and higher compliance values compared to Pdyn/V curves. This reflects the influence of viscoelastance on Pdyn/V curves.¶Conclusion: The study demonstrates a particularly strong tendency to lung collapse in pigs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001340051026
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    Paper (German National Licenses)
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