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  • 1
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    Wall contraction in Bloch wall films. (1972)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: The phenomenon of wall contraction characterized by a peak in the velocity-field relationship and a region of negative differential mobility is observed in uniaxial magnetic thin films of various magnetic properties by careful interrupted-pulse experiments. The observed results agree quite well with the theory for bulk samples when the extensive flux closure of thin film walls is accounted for by a suitable empirical scaling factor.
    Keywords: PHYSICS, SOLID-STATE
    Type: IEEE Transactions on Magnetics; MAG-8; Dec. 197
    Format: text
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  • 2
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    A transient solution for domain wall motion (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An analytic solution of transient wall motion in a bulk ferromagnetic material is obtained from the dynamic torque equations with a Gilbert damping term. The steady state solution reduces to previously obtained, well known solutions.
    Keywords: PHYSICS, GENERAL
    Type: NASA-CR-127036
    Format: application/pdf
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  • 3
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    Low frequency creep in CoNiFe films (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of an investigation of domain wall motion excited by slow rise-time, bipolar, hard-axis pulses in vacuum deposited CoNiFe films 1500A to 2000A thick are presented. The results are consistent with those of comparable NiFe films in spite of large differences in film properties. The present low frequency creep data together with previously published results in this and other laboratories can be accounted for by a model which requires that the wall structure change usually associated with low frequency creep be predominately a gyromagnetic process. The correctness of this model is reinforced by the observation that the wall coercive force, the planar wall mobility, and the occurrence of an abrupt wall structure change are the only properties closely correlated to the creep displacement characteristics of a planar wall in low dispersion films.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-CR-127038
    Format: application/pdf
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  • 4
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    Effects of dc bias on the fabrication of amorphous GdCo RF sputtered films (1975)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: An investigation has been conducted on the effects of a dc bias field applied to Gd(1-x)Co(x) thin films during RF sputter deposition. Such films may possess uniaxial magnetic anisotropy with easy axis perpendicular to the plane of the film and may be used in magnetic bubble devices. Uniformity in composition, thickness and magnetic properties has been achieved and film composition has been controlled to within one percent. However, significant variations of magnetic properties were observed from film to film.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Format: text
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  • 5
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    Deposition temperature of evaporated Permalloy films (1971)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Evaporated Permalloy films deposition temperature measurement by vacuum evaporated Chromel- constantan thin film thermocouple, noting temperature difference between film and glass substrate
    Keywords: MACHINE ELEMENTS AND PROCESSES
    Type: ; ADEMIE DES SCIENCES
    Format: text
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  • 6
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    Transient and steady-state velocity of domain walls for a complete range of drive fields (1974)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Approximate analytic solutions for transient and steady-state 180 deg domain-wall motion in bulk magnetic material are obtained from the dynamic torque equations with a Gilbert damping term. The results for the Walker region in which the transient solution approaches the familiar Walker steady-state solution are presented in a slightly new form for completeness. An analytic solution corresponding to larger drive fields predicts an oscillatory motion with an average value of the velocity which decreases with drive field for reasonable values of the damping parameter. These results agree with those obtained by others from a computer solution of the torque equation and those obtained by others with the assumption of a very large anisotropy field.
    Keywords: SOLID-STATE PHYSICS
    Type: IEEE Transactions on Magnetics; MAG-10; Dec. 197
    Format: text
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  • 7
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    Wall contraction in Bloch wall films (1972)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The phenomenon of wall contraction characterized by a peak in the velocity field relationship and a region of negative differential mobility is observed. Uniaxial magnetic thin films of various compositions and magnetic properties are studied in careful interrupted pulse experiments. The observed results agree quite well with the theory for bulk samples.
    Keywords: MATERIALS, NONMETALLIC
    Type: NASA-CR-127037
    Format: application/pdf
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  • 8
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    The effect of pulse rise time on nanosecond switching in magnetic thin films (1970)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Pulse rise time effect on nanosecond magnetic thin film switching with flux reversal and stray field interaction
    Keywords: PHYSICS, SOLID-STATE
    Type: ; YAL SOCIETY (
    Format: text
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  • 9
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    Wall streaming, creeping, and a new parade motion in Ni-Fe films excited by hard-axis pulses. (1968)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Wall streaming, creeping and parade motion in Ni-Fe films excited by hard axis pulses
    Keywords: PHYSICS, SOLID-STATE
    Type: IEEE PAPER 11.8 , INST. OF ELECTRICAL AND ELECTRONICS ENGINEERS, INTERNATIONAL CONFERENCE ON APPLIED MAGNETICS; Apr 03, 1968 - Apr 05, 1968; WASHINGTON, DC|; ADEMIE DES SCIENCES
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  • 10
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    Bloch wall motion in ferromagnetic films excited by fast-rising hard-axis pulses. (1969)
    In:  Other Sources
    Details
    Publication Date: 2019-06-27
    Description: Bloch wall motion along hard direction of Permalloy films due to fast rising hard-axis pulses
    Keywords: PHYSICS, SOLID-STATE
    Type: ; ADEMIE DES SCIENCES
    Format: text
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