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IEEE Transactions on Magnetics

Issue 1 • Date March 1968

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Displaying Results 1 - 22 of 22
  • [Front cover and table of contents]

    Publication Year: 1968, Page(s): 0
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  • Editorial

    Publication Year: 1968, Page(s): 2
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    First Page of the Article
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  • Biography of the third ICMF

    Publication Year: 1968, Page(s):3 - 5
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    Provides a histoey of the events leading to the Third International Colloquium on Magnetic Films (Boston, Massachusetts, 18-20 September 1967). View full abstract»

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  • Saturation magnetization in ferromagnetic thin films

    Publication Year: 1968, Page(s):6 - 11
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (824 KB)

    The present status of the theory of saturation magnetization of ferromagnetic thin films is reviewed. The extensions of the Heisenberg trace method and the spin-wave method to the case of ferromagnetic thin films is fully discussed together with a comparison of the theoretical results with experimental data. The effect of anisotropic magnetic fields on magnetization and Curie temperature is presen... View full abstract»

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  • Superparamagnetic effects in thin films

    Publication Year: 1968, Page(s):11 - 14
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (512 KB)

    The experimental and theoretical concept concerning the magnetic properties of 2-dimensional arrangements of small particles with different strengths of interaction is discussed. Taking into account recent results on isolated small single-domain particles, a representation for a whole scale of possible structures from these to closely packed ferromagnetic films is given, using a molecular field fo... View full abstract»

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  • Induced anisotropy in Ni-Fe films

    Publication Year: 1968, Page(s):15 - 19
    Cited by:  Papers (21)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    A survey of experimental results for magnetic anisotropy induced during evaporation and annealing of polycrystalline Ni-Fe alloy films is given. Existing data for the uniaxial anisotropy constant K appear to be bounded from above by the combined predictions of strain and directional-ordering theories. The strain anisotropy frequently attains theoretical values... View full abstract»

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  • Electrodeposited films

    Publication Year: 1968, Page(s):19 - 21
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (336 KB)

    This investigation covers: a) control of characteristics of electrodeposited vs. vacuum deposited Permalloy films; b) the preparation of substrates for electrodeposition; c) aging kinetics of electrodeposited NiFeSxfilms from 60° to 90°C; and d) comparison of aging of NiFeSxfilms with electrodeposited films containing other impurities, e.g., NiFeP, and with films ma... View full abstract»

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  • Perpendicular anisotropy of evaporated magnetic films

    Publication Year: 1968, Page(s):22 - 25
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (472 KB)

    Evidence of the existence of origins of perpendicular anisotropy other than the ordinary magnetostrictive effect is presented with a brief review of other studies. As one of these origins, the effect of the grain boundaries or the microscopic shape effect is discussed. The amount of perpendicular anisotropy observed in the stripped films does not seem capable of explanation by this effect only. View full abstract»

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  • Coupling in multilayered magnetic films

    Publication Year: 1968, Page(s):26 - 28
    Cited by:  Papers (9)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    A coupling between the magnetization of two ferromagnetic films separated by a thin metallic layer has been observed. It is shown that when the intermediate layer is palladium the coupling results from diffusion of magnetic atoms into the palladium which makes it weakly ferromagnetic. The main systems in which ferro-antiferromagnetic coupling is observed are Co-CoO, Ni-NiO, FeNi-FeNiMn. In the lat... View full abstract»

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  • Spin-wave resonance

    Publication Year: 1968, Page(s):28 - 31
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    Developments which led to the observation of spin-wave resonance (SWR) spectra in metallic films are presented. The method is discussed with special emphasis placed on the selection of suitable film samples, the counting of resonance peaks, the assignment of mode numbers, the applicability of inhomogeneity models, and the electromagnetic corrections usually applied to the measured dispersion of th... View full abstract»

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  • Theory of magnetization ripple

    Publication Year: 1968, Page(s):32 - 38
    Cited by:  Papers (39)
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    A review is given about the assumptions the development, and the results of the ripple theory. The limits of the linear theory are pointed out. The result of this theory shows a very strong coupling of the magnetization dispersion perpendicular to the mean magnetization, which is caused by the internal demagnetizing field. The exchange constant of this magnetostatic coupling exceeds the quantum me... View full abstract»

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  • Bias susceptibility measurements in thin permalloy films

    Publication Year: 1968, Page(s):39 - 40
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (200 KB)

    Susceptibility measurements at 5000 Hz have been performed in the easy and hard directions on two 80-20 Permalloy films (1000 Å, 1 cm in diameter) cut from large samples. The experimental results agree with the predictions of the Hoffmann theory. The susceptibility parallel to the average direction of M is found to be proportional to View full abstract»

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  • Review of thin-film switching

    Publication Year: 1968, Page(s):41 - 44
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    Flux reversal in thin magnetic films with uniaxial anisotropy is known to occur by domain wall motion if the externally applied field is only slightly above the wall motion threshold field. For sufficiently large fields applied at an angle with respect to the easy axis, reversal takes place by coherent rotation. However, the reversal process observed over a substantial field range immediately abov... View full abstract»

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  • One-dimensional walls

    Publication Year: 1968, Page(s):44 - 47
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (480 KB)

    A one-dimensional wall is one in which the magnetization does not vary throughout the thickness of the ferromagnetic film nor along the length of the wall. There are three types of one dimensional walls: Bloch, Néel, and intermediate. The results of calculations of the structure, width, and type of walls as a function of film thickness and wall angle are discussed. The Néel wall width is... View full abstract»

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  • Recent developments in lorentz electron microscopy

    Publication Year: 1968, Page(s):48 - 50
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (528 KB)

    Several different methods of obtaining contrast for electron microscopy of magnetic specimens are reviewed. For the investigation of magnetization ripple and the structure of domain walls in magnetic films, two questions must be considered: the correct wave optical interpretation of Lorentz micrographs and the experimental attainment of coherence of the electron beam. Both questions have been suff... View full abstract»

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  • Magnetooptical investigations on thin ferromagnetic films

    Publication Year: 1968, Page(s):51 - 54
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (584 KB)

    Various applications of the Faraday and Kerr effects for the investigation of domain structures and reversal mechanisms in thin ferromagnetic films are reviewed. Different optical arrangements for the observation of domains are described and compared. Using magnetooptic microscopy domains and wall structures can be observed with a resolution of 1 μm. Magnetization structures give rise to diff... View full abstract»

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  • Effect of heat treatment on the electrical resistivity of lithium ferrite

    Publication Year: 1968, Page(s):55 - 58
    Cited by:  Papers (10)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (384 KB)

    Polycrystalline lithium ferrite samples were subjected to a variety of heat treatments. The most effective process in raising the sample resistivity was the oxidation process. The efficiencies of these heat treatment processes were compared. Effects of heat treatments on the thermoelectric, microwave line width, and dielectric properties of the samples were also reported. View full abstract»

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  • Effect of a composition gradient on the magnetoelastic sensitivity of Ni-Fe films

    Publication Year: 1968, Page(s):59 - 62
    Cited by:  Papers (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (432 KB)

    Measurements of the magnetoelastic sensitivity of electrodeposited 1 μ cylindrical Ni-Fe films indicate that the magnetostriction of these films becomes more positive upon annealing. A composition gradient has been observed through the thickness of these films. In addition, electron diffraction results indicate that the composition gradient is substantially reduced during an anneal at 250 ... View full abstract»

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  • A dynamic model of a switching twistor wire segment

    Publication Year: 1968, Page(s):63 - 70
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    A semi-empirical differential equation for the local dynamic behavior of a twistor wire is combined with demagnetization equations to yield a set of equations that describe, to the first order, the dynamic switching of a twistor wire segment. The dynamic equation expresses M as a function of M , H , and View full abstract»

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  • Application of micromagnetics to a boundless plate

    Publication Year: 1968, Page(s):70 - 74
    Cited by:  Papers (7)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    The case of magnetization reversal in a boundless plate of magnetically homogeneous material is treated in the framework of micromagnetics. It is assumed that the magnetocrystalline symmetry axis and the applied field lie along the normal of the plate surface. The mathematical analysis performed facilitates the determination of the nucleation field in an exact analytical way, leading to the conclu... View full abstract»

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  • [Back cover]

    Publication Year: 1968, Page(s): 0
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    Freely Available from IEEE
  • Extremely high density magnetic information storage

    Publication Year: 1968, Page(s): 75
    Cited by:  Papers (3)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    First Page of the Article
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Aims & Scope

IEEE Transactions on Magnetics publishes research in science and technology related to the basic physics and engineering of magnetism, magnetic materials, applied magnetics, magnetic devices, and magnetic data storage.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
Pavel Kabos
National Institute of Standards and Technology