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  • 1
    Electronic Resource
    Electronic Resource
    The Mechanisms of Acrylamide Axonopathy (1985)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Pharmacology 25 (1985), S. 643-666 
    Details
    ISSN: 0362-1642
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pa.25.040185.003235
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  • 2
    Electronic Resource
    Electronic Resource
    A reflection high-energy electron diffraction and atomic force microscopy study of the chemical beam epitaxial growth of InAs and InP islands on (001) GaP (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 954-956 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied the formation of strained InAs and InP island structures on GaP surfaces grown by chemical beam epitaxy. InP grows pseudomorphically for 3 ML before island crystallization is observed by reflection high-energy electron diffraction, following a typical Stranski–Krastanov growth mode. For the growth of InAs on GaP, three-dimensional diffraction peaks are observed after 0.9 ML of InAs have been deposited, indicating a Volmer–Weber growth mode. Atomic force microscopy studies of these structures are presented and the optical properties are discussed. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120883
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of rf magnetron sputtering conditions on the magnetic, crystalline, and electrical properties of thin nickel films : 38th Annual Confrerence on Magnetism and Magnetic Materials (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 75 (1994), S. 5779-5781 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin nickel films with thicknesses ranging from 30 to 150 nm were deposited via radio frequency (rf) magnetron sputtering. The influence of argon pressure, film thickness, rf input power, and deposition rate on the magnetic, crystalline, and electrical properties of the films was evaluated. Depending on deposition conditions, film coercivity could be varied from 2 to 290 Oe while saturation magnetization could be varied from 280 to 500 emu/cm3. Higher argon pressures produced lower coercivity films. The films exhibited a dominant fcc(111) orientation. Lower argon pressures and higher rf input powers increased nickel grain sizes. Classical models based on domain wall energy considerations and film microstructure are used to intrepret the observed experimental results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.355560
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  • 4
    Electronic Resource
    Electronic Resource
    Measuring linear polarization of photoluminescence and photoluminescence excitation using a photoelastic modulation technique (1992)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 71 (1992), S. 2397-2402 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Polarization modulation is used to investigate the polarization dependencies in the low-temperature photoluminescence (PL) and the photoluminescence excitation (PLE) of GaAs/AlGaAs quantum wire arrays. The modulation technique employing a photoelastic modulator is described and its implementation in the experimental setup of the PL and PLE experiments is presented. In the PL experiment the technique is used to analyze the emitted light with respect to its polarization, whereas for the PLE experiment the polarization of the exciting light is modulated, probing the polarization dependence of the absorption of the light. Since the modulation of the light is restricted to the polarization, the polarization dependence can be measured simultaneously with the PL or PLE intensity. The versatility and the sensitivity of the technique is exemplified by presenting results of polarized PL and PLE obtained on quantum wire samples grown on the vicinal (100) surface of GaAs by molecular-beam epitaxy that show a considerable anisotropy in the linear polarization for both the PL and PLE.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.351096
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  • 5
    Electronic Resource
    Electronic Resource
    Optimization of low-noise media for 100-Mb/in.2 recording with a magnetoresistive head : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4715-4717 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Single-layer and multilayer longitudinal media were evaluated for 100-Mb/in.2 recording at a 6-μin. flying height with a magnetoresistive head. It was found that the multilayer media produced transition jitter values that were at least 23% below comparable single-layer results. Timing margins, estimated from the measured jitter and asymmetry data, indicate that single-layer media may prove marginal for this application. Multilayer timing margins were projected to be 40%. Signal-to-noise ratio, resolution, and overwrite comparisons are also made for both types of media. The improvements demonstrated with the multilayer media are attributed to the reduced media noise associated with this type of structure. Increased Cr spacer layer thickness in the multilayer media was found to increase jitter and reduce the D70 density response.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348257
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  • 6
    Electronic Resource
    Electronic Resource
    Influence of deposition rate on the magnetic, crystalline, and recording properties of CoCrTa/Cr media (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 70 (1991), S. 7518-7523 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of magnetic layer deposition rate on longitudinal media's magnetic, crystalline, and recording properties was studied. Slower deposition rates were found to produce a systematic reduction in media transition noise. X-ray diffraction and torque magnetometer data indicated that as the deposition rate was slowed, the out-of-plane anisotropy component of the media increased. Slower deposition rates were also found to increase media saturation magnetization. Increased media signal-to-noise ratios were observed when higher process temperatures were used in conjunction with slower rates. These results are discussed in terms of recent theories which have linked phase segregation and out-of-plane crystalline anisotropy with media magnetic and recording properties.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.349703
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  • 7
    Electronic Resource
    Electronic Resource
    Wear properties of yttria-stabilized hafnia overcoats (abstract) : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5765-5765 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Yttria-stabilized hafnia is shown to be another transformation toughening ceramic with good tribological properties. The hafnia was rf-diode sputtered over a 300 nm chromium underlayer on textured aluminum-NiP 130 mm diameter substrates. Wear properties of the hafnia overcoat were evaluated, via contact start-stop (css) testing, as a function of oxygen partial pressure, substrate bias potential and argon pressure. Depending on deposition conditions, a wide range of wear properties were observed. Lower oxygen partial pressures 〈1×10−4 Torr, produced the lowest average friction levels of 0.4–0.5 after 30 000 css. Use of simultaneous substrate bias during deposition, produced hafnia overcoats with relatively high friction levels of 0.7–0.9 after 30 000 css. TEM micrographs revealed some microcracking of the overcoats along texture lines.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347867
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  • 8
    Electronic Resource
    Electronic Resource
    Magnetic, recording, and crystalline properties of multilayered longitudinal thin-film media : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 4727-4729 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Multilayered longitudinal CoCrTa and CoCrPt media were evaluated for magnetic and recording properties. Depending on the alloy, multilayering produced 150–500 Oe increases in coercivity over equivalent single-layer media. These coercivity increases were also found to depend on the chromium underlayer and spacer layer thickness. The coercive squareness of the CoCrPt media was found to decrease upon multilayering, while S* of the CoCrTa double layer showed a slight increase with thicker Cr spacer layers. Double layering of the CoCrPt alloy produced up to a 4-dB increase in signal-to-noise ratio, while double-layer CoCrTa media demonstrated a 2.7-dB increase. Differences between the magnetic and recording properties of CoCrPt multilayers deposited on Cr underlayers of varying thicknesses are analyzed in terms of changes in crystalline anisotropy introduced by the multilayering process.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.348261
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  • 9
    Electronic Resource
    Electronic Resource
    The effect of deposition parameters on the wear properties of yttria-stabilized zirconia overcoats (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4872-4874 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Yttria-stabilized zirconia was rf-diode sputtered over a 250-nm chromium underlayer on textured aluminum-NiP 130-mm-diam substrates. Tribological properties of the overcoat were evaluated via contact start-stop (CSS) testing, as a function of oxygen partial pressure, substrate bias potential, and argon pressure. Depending on deposition conditions, a wide range of friction and wear properties was observed. Lower oxygen partial pressures (〈0.01 Pa) produced the lowest average friction levels of 0.3–0.5 after 30 000 CSS. Use of high argon sputtering pressures (〉1.6 Pa) produced overcoats which demonstrated definite wear and often crashed during contact stop-start testing. SEM and TEM photographs revealed that the overcoats with poor wear characteristics had significantly different grain sizes and higher void contents than overcoats with superior wear properties deposited at lower argon pressures. Application of a fluorocarbon surface lubricant reduced average friction levels after 30 000 CSS from 0.8 on an unlubed disk to 0.35.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344763
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  • 10
    Electronic Resource
    Electronic Resource
    Technique for measuring thermal diffusivity/conductivity of small thermal-insulator specimens (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 2954-2960 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: An experimental technique to measure simultaneously the thermal diffusivity and thermal conductivity of small specimens of thermal-insulator materials is described. Experimental conditions are developed which approach the mathematical idealization of a one-dimensional, infinite, two-component, composite solid whose planar interface is subjected to a step-function heat flux. The heat flux is generated by resistive heating of a thin metallic foil. Although this principle has been exploited previously, the present technique permits specimens with volumes two orders of magnitude smaller than prior work based on the same idealization. A number of difficulties related to small specimen volume are identified and overcome. Another improvement over past efforts is the use of the nonlinear least-squares analysis to determine the optimum values for diffusivity and conductivity. A comparison of measurements of these properties for acrylic and Pyrex glass with literature values suggests that the technique affords accuracies of about 5% for materials in this range.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144340
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