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  • 1
    Electronic Resource
    Electronic Resource
    Effects of hypophosphite contents and surface treatment on electroplated Co-Ni-P thin films : 37th Annual conference on magnetism and magnetic materials (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 5575-5577 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: This article describes the effects of sodium hypophosphite (hypo) content in cobalt nickel sulfate bath, and the duration of surface treatment prior to electroplating, on the magnetic, structural, and electrical properties of Co-Ni-P thin films. The coercivity of the Co-Ni-P layer can be controlled independently either by hypo content or by surface treatment. Transmission electron microscopy microstructure indicates that the width of grain boundaries of Co-Ni-P films is influenced by hypo in the magnetic bath. The mechanism of the coercivity increase by hypo in the bath is thought to result from magnetostatic or exchange decoupling at phosphorus-rich grain boundaries. Effects of these factors on media noise can be well-explained by the microstructural change of Co-Ni-P layers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353655
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  • 2
    Electronic Resource
    Electronic Resource
    Lorentz microscopy studies of magnetization patterns recorded on a real disk : 35th annual conference on magnetism and magnetic materials (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 5886-5888 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this paper we describe a new method for producing samples with large thin areas for Lorentz TEM observation of recorded magnetic domain patterns in production-quality thin-film rigid disks. In this method, as applied in this paper to the study of electroplated Co-Ni-P media, a strippable metal layer is introduced beneath the magnetic layer, along with plated Ni-P which provides a sublayer for magnetic film growth comparable to the normal polished electroless nickel substrate. In this way one can produce a magnetic layer identical to that on a real disk, write data on the disk with a flying head, and then remove the magnetic layer for TEM analysis. We also describe some typical applications of the new method, including a comparison of magnetic domain structure at recorded transitions in high- and low-noise media, and an illustration of the effect of head pole geometry on bit-cell shape.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347857
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of a transition layer on CoCr films (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 57 (1985), S. 3997-3999 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effects of a transition layer separating the substrate and the columnar structure of rf sputtered CoCr films on their magnetic and structural properties have been investigated. The films were removed from glass substrates and the transition layer was etched directly by rf sputtering. It is shown that the abrupt change or anomalous jump observed in the in-plane magnetization hysteresis loop of some CoCr films is caused by a fine-grained transition layer which is about 1000 A(ring) thick and has a coercivity of 200 Oe. The measured in-plane coercivity increased to 1000 Oe when the transition layer was completely removed while no change was observed in the perpendicular coercivity or saturation magnetization. Only films having a transition layer showed a large decrease in the effective anisotropy field as determined from the in-plane loop when sputter etched to a depth of 2000 A(ring) from the top surface. The dispersion of the hcp (002) axes was found to be 3° for films without and 16° for films with a transition layer. These dispersions were found to be independent of the sputter-etched depth indicating that the intrinsic dispersion of the orientation of CoCr films is established by the transition layer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.334888
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  • 4
    Electronic Resource
    Electronic Resource
    Vibrations of imperfect laminated panels under complex preloads
    Amsterdam : Elsevier
    International Journal of Non-Linear Mechanics 27 (1992), S. 51-62 
    Details
    ISSN: 0020-7462
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-7462(92)90022-Y
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  • 5
    Electronic Resource
    Electronic Resource
    Reduction methods based on eigenvectors and Ritz vectors for nonlinear transient analysis (1993)
    Springer
    Computational mechanics 11 (1993), S. 65-82 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Reduction methods using eigenvectors and Ritz vectors as basis vectors are empolyed to reduce the finite element nonlinear system of equations using a 48 D.O.F. doubly curved thin plate/shell element. With and without basis updating, the solutions obtained by reduction methods are compared with the direct solutions. It is observed that basis updating is essential to obtain accurate solutions. The present reduction methods need a large number of basis vectors (eigenvectors and Ritz vectors) to account for the impact load which has high frequency characteristics. Furthermore, for nonlinear analysis, the reduction achieved in the CPU time are only marginal since most of the CPU time was spent in the calculation of the internal nodal force vector. These considerations indicate that reduction methods may not be efficient for the impact response analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00370072
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