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  • 1
    Electronic Resource
    Electronic Resource
    DX centers in Si-doped AlxGa1−xAs grown by metalorganic chemical vapor deposition (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 1669-1673 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Three levels corresponding to photo energies E0(=1.7 eV), E1(=1.43 eV), and E2 (=energy gap) were observed in differential photocapacitance measurements of Si-doped AlxGa1−xAs grown by metalorganic chemical vapor deposition (0.23〈x〈0.4). On the other hand, E1 and E2 were observed but E0 was not observed in the differential photoconductance measurements. Both photon energies E1 and E2 cause persistent photoconductance (PPC) and the electron concentration coincides with the concentration of Si atoms. Our results support the broken-bond model proposed by D. J. Chadi and K. J. Chang [Phys. Rev. B 39, 10063 (1989)].
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346650
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  • 2
    Electronic Resource
    Electronic Resource
    Magnetic anisotropy by ferromagnetic particles alignment in a magnetic field (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 67 (1990), S. 4493-4495 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Magnetic and optical properties of films composed of ferromagnetic fine particles aligned in a magnetic field were investigated. The spin-coated films were prepared by using a solution of magnetite fine particles dissolved in water-diluted polyvinyl alcohol (PVA) on glass substrates, and followed by drying at 80 °C and solidifying at 200 °C in a magnetic field. Linear-chain clusters of magnetite particles were formed in a considerably weak field below 1 kOe, which give rise to magnetic and optical uniaxial anisotropies. Both properties vary depending on preparation conditions such as the particle concentration, the viscosity of the solution, and the field strength during drying.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.344892
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  • 3
    Electronic Resource
    Electronic Resource
    Soft magnetic properties of composite-anisotropy CoNbZr/ceramics multilayers (invited) : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5580-5585 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: CoNbZr/ceramics multilayered films, the metal layers of which have sequentially changed anisotropy directions, were investigated. Such newly processed film is called "composite-anisotropy multilayer film.'' The effects of this new processing on soft magnetic properties were studied. In the case where the shift angle in the easy magnetization direction between neighboring CoNbZr layers is 45°, a smooth B-H loop with low coercivity was obtained. Furthermore, annealing from 200 to 400 °C resulted in high permeability (μ') of 1000–1500 and excellent frequency responses of μ' above 100 MHz in all directions in the plane of the film. These results could be explained in terms of magnetic interactions of the CoNbZr magnetic layers which are in close contact with one another across the intervening ceramics layers. These findings indicate that such composite film has many advantages over conventional uniaxial multilayers in applications to magnetic devices. Since these characteristics are thought to be very significant for microdevices composed of disc-shaped magnetic cores, we fabricated a planar microtransformer composed of circular spiral coils and disk-shaped magnetic cores, 2.4 mm in size, using photolithographic technology. The input–output voltage ratio, VOUT/VIN, was measured in the frequency range of 2–40 MHz and showed a high value of 0.83 at 40 MHz.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353658
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  • 4
    Electronic Resource
    Electronic Resource
    Elliptical-polarization measurements in the vacuum ultraviolet and soft x-ray regions with a reflection polarimeter : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1458-1461 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A complete polarization analysis has been successfully achieved for synchrotron radiation beams in the vacuum ultraviolet and soft x-ray regions using a reflection polarimeter. The Stokes parameters, which provide a full description of the polarization state of light, were experimentally determined along with three polarizing quantities of the polarimeter. The present result indicates the possibility of a simultaneous determination of the optical constants of mirror materials through polarization analyses.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143042
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic circular dichroism at the M2,3 edges in three-dimensional transition metals and their compounds : Proceedings of the 4th international conference on synchrotron radiation instrumentation (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 1371-1374 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The combined utilization of directly characterized off-plane circularly polarized synchrotron radiation and an ultrahigh-vacuum compatible superconducting magnet has enabled magnetic-circular-dichroism (MCD) experiments, mainly at the M2,3 core absorption edges. Details concerning the experimental technique, which allowed quantitative MCD measurements, are described. The results are presented and discussed for single crystals of Ni, Fe, and Fe3O4, and an Fe/Pt multilayer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143073
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  • 6
    Electronic Resource
    Electronic Resource
    Erratum: "Magnetic circular dichroism at the M2,3 edges in three-dimensional transition metals and their compounds'' [Rev. Sci. Instrum. 63, 1371 (1992)] (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3529-3529 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1143796
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  • 7
    Electronic Resource
    Electronic Resource
    Molecular Cloning of cDNA to mRNA for a Cerebellar Spot 35 Protein (1987)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 48 (1987), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: The nucleotide sequence of mRNA for rat cerebellar spot 35 protein, a Ca-binding protein, was determined from recombinant complementary DNA (cDNA) clones. The sequence was composed of 1, 714 base pairs (bp) which included the 783 bp of the complete coding region, the 130 bp of the 5′-noncoding region, and the 801 bp of the 3-noncoding region containing a polyadenylation signal. In addition, a polyadenylic acid [poly(A)] tail was also found. Because the size of spot 35 mRNA was estimated to be about 1,900 bases by Northern blot analysis, the longest insert was verified to contain a nearly full-length cDNA sequence including the poly(A) tail. The amino acid sequence of the protein deduced from the nucleotide sequence contains 261 amino acids and at least five Ca-binding domains. There was a high homology in the amino acid sequences (79%) and the nucleotide sequences (77%) between spot 35 protein and chick intestinal Ca-binding protein (28K).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1987.tb05706.x
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  • 8
    Electronic Resource
    Electronic Resource
    Light scattering in a thin film of a mixture of dielectric and magnetic fluids under an electromagnetic field (1994)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 76 (1994), S. 3920-3922 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Light scattering in a thin film of a mixture of dielectric and magnetic fluids has been studied under both electric and magnetic fields. The film can transmit visible light in no electric field. When an electric field is applied across the film, the transmittance decreases rapidly. The phenomenon is explained by Rayleigh scattering due to the dielectric clusters formed under the field. The decay time to return to the transmittance at no electric field after switching off the field is much larger than the response time after switching on the field; however, the usage of a magnetic as well as an electric field allows the decay time to be shortened.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.357402
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  • 9
    Electronic Resource
    Electronic Resource
    Epitaxial growth of Bi-Sr-Ca-Cu-O superconducting thin films by metalorganic chemical vapor deposition (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 928-930 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The epitaxial growth of Bi-Sr-Ca-Cu-O thin films was achieved by metalorganic chemical vapor deposition. The film-MgO substrate interface has been examined and discussed using the cross-sectional transmission electron microscopy. On the smooth surface of the MgO substrate, the lattice of the film was ordered from the first atomic layer on the surface of the substrate, and the misfit dislocations caused by the large lattice mismatch between the film and the MgO substrate appeared every four or five lattices. The first Bi2O2 layer on the substrate surface was found to be regularly arranged regardless of the roughness of the substrate surface. The x-ray diffraction patterns of the films as a function of the growth time showed that the high Tc phase (Bi2Sr2Ca2Cu3Ox) was not formed in the early stage of the growth while its amount increased as the growth was prolonged. These results suggest that the high Tc phase is not directly grown but formed via the low Tc phase (Bi2Sr2CaCu2Ox) or semiconducting phase (Bi2Sr2CuOx) with the thermal diffusion limited growth of Cu-O and Ca layers. Even an 8-nm-thick film was found to be free of the compressive stress forming misfit dislocations observed in the transmission electron microscope photograph of the thicker film, since the length of the c axis in the 8-nm-thick film is not enlarged from the result of the x-ray diffraction pattern.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104269
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  • 10
    Electronic Resource
    Electronic Resource
    Fabrication of transparent iron-oxide films by means of sol-gel synthesis (abstract) (1988)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 64 (1988), S. 5452-5452 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Transparent iron-oxide films were fabricated by sol-gel synthesis using a solution of ferric nitrate (III) dissolved in ethylene glycol.1 The solution was kept at 80 °C and stirred constantly in a nitrogen atmosphere. The gel with an appropriate viscosity was spin coated on soft glass plates, then dried and heated in air at various temperatures for 5 h. The films thus prepared are about 0.2 μm thick, amber colored, and especially transparent in the near-infrared region, whose transmittance exceeds 90%. Maximum saturation magnetization 4πMs=0.74 kG [curve (a)] was obtained by annealing at 450 °C, which is still insufficient to use practical application. Reduction heat treatment in a hydrogen atmosphere is found to be very effective to improve magnetic properties: 4πMs is increased to 3 kG [curve (b)], which is about four times as large as the previous one, but the films become semitransparent due to formation of magnetite particles. Original high transmittance recovers by successive annealing in air at 400 °C without any degradation of magnetic properties [curve (c)], where diffraction peaks of maghemite were observed. This strongly suggests that magnetic anisotropy may be arbitrarily controlled by forming linear chains of ferromagnetic particle clusters through reduction heat treatment in a magnetic field. Faraday rotation θF of the samples was also measured. These films are promising as a new type magneto-optic material.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.342345
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