Browsing by Author "Bourne, Henry"

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    Anisotropy control of Ni-Fe films
    (1966) Wu, Hei-Hau; Bourne, Henry
    This paper presents a technique to control the anisotropy of nickel-iron films by appropriate masking during deposition. Because of the demagnetizing effect, the resulting anisotropy is increased if ridges representing thickness variations are formed along the easy axis and is decreased if ridges are perpendicular to the easy axis. Low-anisotropy films may be applicable in thin film memories because of small driving fields and fast responses. A theoretical model is postulated to explain this effect. Some numerical calculations and experimental data confirm the predicted phenomenon.
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    Deposition temperature of evaporated permalloy films
    (1972) Chow, Ling George; Bourne, Henry
    A vacuum evaporated chromel and constantan thin film thermocouple is developed and used to measure the deposition temperature of evaporated permalloy films. The maximum permalloy film temperature is 12000 higher than the glass substrate temperature during deposition for low evaporation rate, 15 Å/sec, due to radiation energy from the tungsten boat and condensation energy from the permalloy films. In all cases, the temperature change due to radiation energy greatly exceeds that due to condensation energy. The heat loss through the glass substrate is negligible during deposition; under this condition the temperature change during deposition is predicted by theory.
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    FABRICATION AND SWITCHING CHARACTERISTICS OF FERROMAGNETIC THIN FILMS
    (1966) WATSON, JAMES KENNETH; Bourne, Henry
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