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  • 1
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 3091-3099 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A statistical model to investigate the distribution of dynamic random access memory data retention times is proposed. The model assumes that the retention time is determined by a junction leakage current generated at carrier traps by a Shockley–Read–Hall process, and that the trap levels are randomly distributed not only among the memory cells but also within a cell. Monte Carlo results based on the model were in excellent agreement with experimental results, which confirmed the validity of the model. An analytical expression of the retention time distribution was also derived, and proved a good approximation near the 50% cumulative probability. Based on the model, variation in the retention time distributions among samples was found to be related to different trap-level distributions at the SiO2/Si interface. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5324-5326 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The solid immersion lens (SIL) near-field magneto-optical (MO) recording technique offers a significant increase in areal density through near-field resolution enhancement. Since the near-field recording scheme requires close proximity of the optical recording head and the magnetic medium, the SIL MO recording setup is usually changed to a "first surface" recording. This requires further optimization of the optical flying head design and a MO medium. In this work marks as small as 150 nm using a SIL with a 680 nm laser source and a TbFeCo magneto-optical medium were recorded. The minimum size of a recorded mark is strongly dependent on the slider flying height, the flying attitude, and lens centering. It should be emphasized that recording power as small as 4 mW is sufficient enough to achieve carrier-to-noise ratio of more than 30 dB. © 1999 American Institute of Physics.
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  • 3
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5091-5093 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and magneto-optical properties of TbFeCo/Pt and TbFeCo/Pd multilayer films prepared by sputter deposition are discussed in conjunction with the multilayer structure. The magnetic behaviors in TbFeCo/Pt and TbFeCo/Pd multilayers are very similar to each other, and the saturation magnetization Ms at 298 K increases with thickness t of Pt and Pd up to tPt, tPd=12 Å. In TbFeCo/Pt multilayers, the contribution of Pt to the polar Kerr spectra is significant at ultraviolet photon energies. The Kerr rotation θK and ellipticity ηK are enhanced with Pt layer thickness and become saturated at tPt=12 Å. On the other hand, little contribution from Pd atoms is found in the TbFeCo/Pd multilayer. © 1999 American Institute of Physics.
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  • 4
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 87 (2000), S. 6902-6904 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The magnetic and magneto-optical properties of TbFeCo/(Pt, Pd) multilayer films prepared by sputter deposition are discussed in conjunction with their multilayer structure. The effect of polarized Pt on the polar Kerr spectra is significant at ultraviolet photon energies (∼5 eV). Based on the magnetic and magneto-optical properties, it is quite reasonable to surmise that an alloy is formed at the interface in real multilayers. It is the most obvious evidence that the saturation magnetization drastically increases with Pt and Pd thickness up to 12 Å, which indicates that the interfacial regions are essentially due to Fe–Pt and Fe–Pd alloys. This possibility was supported by the simulation of Kerr spectrum for the proposed model based on the layered-structural analyses. © 2000 American Institute of Physics.
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  • 5
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6753-6755 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of Pt additives in TbFeCo(Pt)/Pt multilayers on magnetic properties and magneto-optical Kerr effect is investigated. The perpendicular magnetic anisotropy Ku of the multilayer becomes larger (∼2×106 erg/cm3) than that of the TbFeCo(Pt) single layer. Pt layers are found to contribute significantly to the polar Kerr spectra at ultraviolet photon energies beyond 4 eV. The largest enhancement in the Kerr rotation θK is found at about 5 eV. The Kerr rotation θK and ellipticity ηK are enhanced with increasing Pt layer-thickness tPt, and become saturated at tPt=12 Å. This result implies that Pt atoms up to about 6 Å from the interfaces are contributing to the Kerr activity. © 1998 American Institute of Physics.
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  • 6
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 5600-5611 
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have studied the dynamical motion of magnetic-flux lines penetrating into a melt-processed Y–Ba–Cu–O bulk superconductor during pulsed field magnetization. Subsequent flux creep was investigated by measuring signals from three Hall sensors mounted at the center, periphery, and the midpoint on the top surface of the sample at 77 K. The penetration of the magnetic flux into the sample is quite sluggish as long as the applied field is low. However, the magnetic flux penetrates suddenly and moves rapidly in response to the changing external field during the ascending stage of the pulsed field, when the intensity exceeds 1.5–2 T. Furthermore, when the rise time of the pulsed field is very short, the local magnetization measured at the midpoint is found to oscillate with time, as soon as the sudden penetration of the magnetic flux takes place. The fast motion of the magnetic flux generates heat and increases the temperature of the sample. This effect appears as a reduction of the trapped flux, already in the descending stage of the pulsed field and it contributes to the suppression of the flux creep after the pulse. The creep is suppressed more when the applied field is large, and it diminishes most in the center of the sample. © 1997 American Institute of Physics.
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  • 7
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2946-2948 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We demonstrate optical response from a side-injection light-controlled bistable laser diode buried with semi-insulating InP using hydride vapor phase epitaxy. The buried surface around both the 〈110〉 and 〈−110〉 oriented mesas is flat. The bistable operation is obtained by applying control voltage to the saturable absorption region. After optimization of the device parameters, we obtained error-free operation at a bit rate as high as 2.5 Gbit/s. © 1997 American Institute of Physics.
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  • 8
    Electronic Resource
    Electronic Resource
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 60 (1992), S. 472-473 
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Room-temperature cw operation of an InGaAs/InGaAsP multiple quantum well (MQW) laser diode on a Si substrate is reported. The MQW laser emits at a 1.54 μm wavelength and exhibits no degradation after over 2000 h of operation. Employing a hybrid organometallic vapor phase epitaxy/vapor mixing epitaxy method and a layer structure for improving crystalline quality, high-quality MQW layers are obtained. A stable longitudinal mode spectrum demonstrates the effectiveness of the MQW active layer.
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  • 9
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The internal structure of fish meat gel without salt made from Walleye pollack surimi were observed using a conventional scanning electron microscope (SEM) and a variable pressure-SEM (VP-SEM) at low magnifications (50x and 250x). An aggregated structure was observed under the conventional SEM, whereas a macro network structure (〉 10 μm) was observed on an exposed inner face of the same gel under the VP-SEM. These findings suggest that the endogenous network structure in fish meat gel might be destroyed during processes in preparation of samples for conventional SEM such as fixation, dehydration and metal coating. In gels containing various concentrations of NaCl, network, porous, and crevasse-like structures were also observed under the VP-SEM. These findings indicate that VP-SEM could be a very useful tool for observation of the intact internal structure of fish meat gel.
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