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  • 2000-2004  (250)
  • 1995-1999  (233)
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  • 1
    Electronic Resource
    Electronic Resource
    Investigation of intermittent magnetic flux in the auroral zones with kilometer radiation (AKR) (2001)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 8 (2001), S. 625-630 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: On the basis of the nonlinear equations for self-generated magnetic fields, it is numerically shown that the magnetic fields self-generated are instable and may collapse, resulting in spatially highly intermittent flux fragment. Numerical results show that the enhanced magnetic flux has a strength about up to 10−2 Gauss in range about around 250–350 km in auroral zones with kilometric radiation (AKR), which correspond to estimated values in both the strength and characteristic scale by Mckean et al. [J. Geophys. Res. [Oceans] 96, 21055 (1991)]. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1337067
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  • 2
    Electronic Resource
    Electronic Resource
    Self-generated magnetic field by transverse plasmons in laser-produced plasma (2000)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 7 (2000), S. 3405-3412 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Quasisteady magnetic fields could be generated in laser-produced plasmas with high-frequency electromagnetic radiation through wave–wave and wave–particle interactions in the vicinity of the critical point. The behavior of self-generated magnetic fields can be described by nonlinear coupling equations. It is analytically indicated that self-generated magnetic fields are modulationally unstable with respect to the uniform state of a plasma; such an instability would localize the magnetic fields within narrow regions near the critical surface. The theory is supported by a detailed comparison with experiments in laser-produced plasmas. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.874204
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  • 3
    Electronic Resource
    Electronic Resource
    The free electron laser–peniotron hybrid: Physics and features (1995)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 2 (1995), S. 3488-3493 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The free electron laser–peniotron hybrid is studied. It is shown by computer simulations that the free electron laser–peniotron hybrid, with the synchronous condition ω−(kw+k(parallel))v(parallel)−ωc≈0, is a strong interaction, and has an efficiency as high as that of the peniotron. The interaction of the free electron laser–peniotron hybrid is compared with that of the free electron laser–cyclotron hybrid. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871130
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  • 4
    Electronic Resource
    Electronic Resource
    Longitudinal and transverse Hall resistivity of epitaxial SrRuO3 films (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 5792-5794 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the longitudinal ρxx and transverse Hall ρxy resistivities of epitaxial SrRuO3 (SRO) under varied applied fields. The Hall resistivity, ρxy, is proportional to 1/(T−Tc) in the paramagnetic state of SRO films, where Tc is the asymptotic Curie temperature. The Lorentz resistivity Δρ(H)Lorentz in a fixed magnetic field in the ferromagnetic regime of SRO films is proportional to A(1−T/Tc)p with p∼0.5. RH is positive for T〉125 K and changes sign at T∼125 K for SRO films. The RH remains negative down to low temperatures. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.369921
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  • 5
    Electronic Resource
    Electronic Resource
    Subgap excitation of defect band photoluminescence in phosphorous doped hydrogenated amorphous silicon (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 4587-4591 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article presents a study of the effect of temperature on the defect band photoluminescence (PL) of moderately phosphorous doped amorphous silicon thin films deposited by magnetron sputtering. We have identified two types of recombination processes responsible for the observed temperature dependence of the defect PL band produced by subgap excitation. One of the processes is similar to that observed in intrinsic hydrogenated amorphous silicon and may originate from the recombination of carriers at band tail states and dangling bonds. The donor-defect pairs at nearest neighbor sites may be responsible for the second recombination process. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363441
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  • 6
    Electronic Resource
    Electronic Resource
    Goldstone modes of incommensurate chromium alloys : The 40th annual conference on magnetism and magnetic materials (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 4824-4826 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The spin excitations about the two incommensurate wavevectors of the spin-density-wave (SDW) state in Cr are studied for the first time within the random-phase approximation. Transverse spin-wave (SW) modes and longitudinal phason modes are associated with the rotational and translational symmetries of Cr. While both mode frequencies vanish at the SDW ordering wavevectors, only the SW mode with linear dispersion and mode velocity c=vF/(square root of)3 is undamped for nonzero frequencies. As in a local-moment system, the SW mode corresponds to the rigid rotation of the local magnetic moments. The phason modes have a nearly linear dispersion at low frequencies with velocity cph〈c. As T approaches TN, cph approaches c. Phason modes have been observed in the longitudinally polarized SDW state below 120 K in pure Cr and are responsible for a 60 meV peak in the cross sections midway between the satellites. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.361620
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  • 7
    Electronic Resource
    Electronic Resource
    Phase separation and ordering coexisting in InxGa1−xN grown by metal organic chemical vapor deposition (1999)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 75 (1999), S. 2202-2204 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have recently reported the occurrence of phase separation in InxGa1−xN samples with x〉0.25. Theoretical studies have suggested that InxGa1−xN can phase-separate asymmetrically into a low InN% phase and an ordered high InN% phase. In this letter, we report on the existence of simultaneous phase separation and ordering of InxGa1−xN samples with x〉0.25. In these samples, phase separation was detected by both transmission electron microscopy selected area diffraction (TEM-SAD) and x-ray diffraction. Ordering was detected by both imaging and TEM-SAD. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.124964
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  • 8
    Electronic Resource
    Electronic Resource
    Effect of probe geometry on the Hall response in an inhomogeneous magnetic field: A numerical study (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6161-6165 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of probe geometry on the classical Hall response to a weak perpendicular inhomogeneous magnetic field is studied numerically. An electric potential equation based on a classical model of the two-dimensional Hall effect is solved numerically for a generalized flux distribution to find the Hall response function. We find that the magnitude and shape of this response function is strongly affected by probe geometry. Asymmetric cross-shaped Hall probes, with one narrow voltage lead, have a strongly peaked response more localized than in symmetric probe arrangements. This suggests novel lithographic patterns that may improve the spatial resolution of Hall magnetometry and scanning Hall probe microscopy. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367485
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  • 9
    Electronic Resource
    Electronic Resource
    Photoluminescence studies of hydrogenated amorphous carbon and its alloys (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 4508-4514 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this article, we have studied the photoluminescence (PL) behaviors of a-C:H and its alloys (a-C:H,N,F). The samples were deposited in a radio frequency plasma enhanced chemical vapor deposition system with various mixtures of CH4, N2, and NF3 gases. For this work, the effects of doping and excitation energy on PL peak position and bandwidth were investigated in detail. It was found that with the decrease in Tauc gap, the PL peak shifts to lower energy and the bandwidth is narrowed. If the excitation energy is below a certain energy, the PL peak shifts to lower energy and the bandwidth is reduced through a cutoff of the high energy region. If the excitation energy is above a certain energy, the PL becomes saturated and the shape remains almost the same. Our results support the cluster model proposed by Robertson that a-C:H contains both sp2 and sp3 sites, with sp2 clusters embedded in a sp3 bonded matrix. Our PL data are explained by the distribution function of cluster gaps. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366185
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  • 10
    Electronic Resource
    Electronic Resource
    Phase separation in InGaN grown by metalorganic chemical vapor deposition (1998)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 72 (1998), S. 40-42 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report on phase separation in thick InGaN films with up to 50% InN grown by metalorganic chemical vapor deposition from 690 to 780 °C. InGaN films with thicknesses of 0.5 μm were analyzed by θ–2θ x-ray diffraction, transmission electron microscopy (TEM), and selected area diffraction (SAD). Single phase InGaN was obtained for the as-grown films with 〈28% InN. However, for films with higher than 28% InN, the samples showed a spinodally decomposed microstructure as confirmed by TEM and extra spots in SAD patterns that corresponded to multiphase InGaN. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.120639
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