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  • 1
    Electronic Resource
    Electronic Resource
    Effects of orientation on the time decay of magnetization for cobalt–alloy thin film media (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 4997-4999 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The dependence of the time decay of magnetization on orientation ratio was investigated for longitudinal Co–alloy thin film media. The coercivity orientation ratio was controlled by the degree of mechanical texture. For oriented samples, it was found that the remanent magnetization along the circumferential direction decayed faster with time than that along the radial direction when the applied reverse magnetic field was near the remanent coercivity. However, the remanent magnetization along the circumferential direction decayed more slowly with time than that along the radial direction when the applied reverse magnetic field was less than roughly half the remanent coercivity. Anisotropic interactions and magnetic anisotropy distributions appear to be the cause for the different time decay of magnetization along the circumferential and radial directions for oriented media. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370070
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  • 2
    Electronic Resource
    Electronic Resource
    Interdiffusion of multilayer ferroelectric thin films using YBa2Cu3O7−x as an intermediate layer (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 79 (1996), S. 7621-7626 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Interdiffusion between layers in multilayer ferroelectric thin films was studied from their elemental depth profiles using secondary ion mass spectrometry. Among the films deposited on YBa2Cu3O7−x/CeO2/Si substrates, the interdiffusion is most pronounced for [Sr0.5Ba0.5]Nb2O6 (SBN) films, less marked for Pb0.97La0.03(Zr1−xTix)0.9925O3 (PLZT, x=0.54 or 0.34) films, and is least significant for BaTiO3 films. Higher substrate temperature used for growing SBN films is believed to be the main cause of interdiffusion. The larger proportion of cationic vacancies existing in PLZT films is another possible source inducing interdiffusion. Using YBa2Cu3O7−x/SrTiO3 as substrates substantially reduces the interdiffusion between layers. This is ascribed to the better crystallinity of the YBa2Cu3O7−x layers deposited on SrTiO3 substrates. These results indicate that both the characteristics of ferroelectric films and the underlying YBa2Cu3O7−x layers substantially modify the interdiffusion behavior between the layers. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362340
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  • 3
    Electronic Resource
    Electronic Resource
    The growth behavior of Pb0.95La0.05(Zr0.7Ti0.3)0.9875O3 films on silicon substrates synthesized by pulsed laser deposition (1995)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 77 (1995), S. 5335-5340 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The highly (110) textured Pb0.95La0.05(Zr0.7Ti0.3)0.9875O3 (PLZT) films have been successfully grown on SrTiO3(STO)-buffered silicon substrates. The films, deposited by pulsed laser deposition process, are assumed to form via a two-step process, i.e., cluster adherence and phase transformation. The beneficial effect of using STO as buffer layers involves enhancing the kinetics of phase transformation from amorphous phase to perovskite. The loss of Pb species from the films is thereby suppressed. The optimum dielectric constants obtained are around εr=490 for PLZT/STO/Si films deposited at 550 °C (1 mbar oxygen pressure, PO2) and post-annealed at 550 °C (1 atm PO2). The corresponding charge storage density is around Qc(approximately-equal-to)1.5 μC/cm2 at 50 kV/cm applied field strength. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.359289
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  • 4
    Electronic Resource
    Electronic Resource
    SrTiO3 buffering effect on Pb1−xLaxTiO3 thin films prepared by pulsed laser deposition (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 3401-3403 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of phase-pure perovskite PLT (Pb0.95La0.05Ti0.9875O3) were deposited in situ onto Si, Pt/Ti/SiO2/Si, and SrTiO3/Si substrates by pulsed laser deposition from stoichiometric targets. No Pb loss was observed in the near-surface region. The blocking of the interdiffusion between inner Si substrate and the outer PLT films by SrTiO3 buffer layer was evidenced using x-ray diffraction (XRD) and secondary ion mass spectrometry (SIMS) analyses. The formation of TiO2 second phase in PLT/Pt/Ti/SiO2/Si films was indicated by XRD and SIMS spectra to be the outward diffusion of Ti atoms from the underlying Ti layer through the Pt layer, reacting with ambient O2 at the PLT-to-Pt interface. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.116517
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  • 5
    Electronic Resource
    Electronic Resource
    Influence of the permanent magnet overhang on the performance of the brushless dc motor : The 7th joint MMM-intermag conference on magnetism and magnetic materials (1998)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 83 (1998), S. 6362-6364 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Axial overhang of the permanent magnets has been used to enhance the performance of radial flux brushless dc motors, but its precise contribution to performance is not well known. This article aims at the investigation of the overhang effects by finite element and lumped parameter modeling. An empirical formula which allows two-dimensional analysis to account for overhang effects is proposed. A three-dimensional equivalent magnetic circuit model is developed and its ability to accurately predict overhang effects is assessed. Results of finite element and lumped parameter models are compared and a design methodology is forwarded. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.367809
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  • 6
    Electronic Resource
    Electronic Resource
    Secondary ion mass spectrometric studies of SrTiO3 buffering effect on (Pb1−xLax)(Zr1−yTiy)1−x/4O3 thin films prepared by pulsed laser deposition (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 66 (1995), S. 156-158 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Thin films of (Pb1−xLax)(Zr1−yTiy)1−x/4O3 (5/70/30) were deposited in situ onto (100) Si, Pt/Ti/SiO2/Si, and SrTiO3/Si substrates by pulsed laser deposition from stoichiometric targets and subsequent annealing. Films grown on SrTiO3/Si exhibited desired perovskite structure. On (100) Si and Pt/Ti/SiO2/Si substrates, films exhibited a perovskite-pyrochlore mixed structure. Apparent Pb deficiency at the near-surface region was observed. Films deposited at different substrates showed variations in Si content. The buffering effect of SrTiO3 was evidenced using x-ray diffraction and secondary ion mass spectrometry analyses. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.113548
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  • 7
    Electronic Resource
    Electronic Resource
    A Dihydrate Complex of Molybdosilicic Acid and Hexamethylphosphoramide, [{(CH3)2N}3PO]5[H4SiMo12O40].2H2O (1998)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 54 (1998), S. 327-329 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270197015850
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  • 8
    Electronic Resource
    Electronic Resource
    cis-Bis(2-methyl-8-quinolinolato-N,O)dioxomolybdenum(VI) (1996)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 52 (1996), S. 1150-1152 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270195016933
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  • 9
    Electronic Resource
    Electronic Resource
    Study on the coercivity of granular solid iron (1995)
    Springer
    Applied physics 61 (1995), S. 407-413 
    Details
    ISSN: 1432-0630
    Keywords: PACS: 75.60.Jp; 75.30.Gw
    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 iron granular solid, in which ultrafine iron particles are dispersed, has been prepared with both SiO2 and Cu matrices using the sol-gel method. The structure and morphology of these granular solid samples are investigated by X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). The magnetic properties are measured using a vibrating sample magnetometer with 20 kOe maximum applied field. It is found that the coercivity decreases very slightly with temperature from 80 to 300 K for these Fe–SiO2 and Fe–Cu granular solid samples with different average size of iron particles from 50 to 300 AÅ. The magnetic anisotropy has been obtained from the measured magnetization curves for these granular solid samples using the law of approach to saturation, and the obtained values of the effective magnetic anisotropy are all more than 106 erg/cm3, which are larger than the value of the magnetocrystalline anisotropy for bulk iron. The coercivity vs temperature for these granular solid samples has been calculated using the Kneller and Luborsky theory, in which the magnetic anisotropy values obtained from the law of approach to saturation are used. The trends of the calculated coercivity as a function of temperature are in reasonable agreement with the observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540115
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  • 10
    Electronic Resource
    Electronic Resource
    Study on the coercivity of granular solid iron (1995)
    Springer
    Applied physics 61 (1995), S. 407-413 
    Details
    ISSN: 1432-0630
    Keywords: 75.60.Jp ; 75.30.Gw
    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 iron granular solid, in which ultrafine iron particles are dispersed, has been prepared with both SiO2 and Cu matrices using the sol-gel method. The structure and morphology of these granular solid samples are investigated by X-Ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). The magnetic properties are measured using a vibrating sample magnetometer with 20 kOe maximum applied field. It is found that the coereivity decreases very slightly with temperature from 80 to 300 K for these Fe−SiO2 and Fe−Cu granular solid samples with different average size of iron particles from 50 to 300 Å. The magnetic anisotropy has been obtained from the measured magnetization curves for these granular solid samples using the law of approach to saturation, and the obtained values of the effective magnetic anisotropy are all more than 106 erg/cm3, which are larger than the value of the magnetocrystalline anisotropy for bulk iron. The coercivity vs temperature for these granular solid samples has been calculated using the Kneller and Luborsky theory, in which the magnetic anisotropy values obtained from the law of approach to saturation are used. The trends of the calculated coercivity as a function of temperature are in reasonable agreement with the observations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01540115
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