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Dynamic behavior of domain walls in double layer self-biasing bubble garnet films

Zebrowski, Jan J. and Humphrey, Floyd B. (1979) Dynamic behavior of domain walls in double layer self-biasing bubble garnet films. IEEE Transactions on Magnetics, 15 (6). pp. 1915-1921. ISSN 0018-9464. doi:10.1109/TMAG.1979.1060352.

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Radial expansion of bubbles and gradient bubble propagation experiments were conducted in a double layer garnet film with perpendicular anisotropy in both layers. Implanted and as-grown samples are compared. In radial expansion the side walls of the bubble exhibit a linear mobility much lower than calculated from γΔ/α. Saturation occurs at high drives (35 Oe). At drives above 50 Oe the saturation velocity of 27 m/s occurs only in the first 120 ns of the motion. After that the velocity drops to 17.5 m/s still independent of drive. This break in velocity does not occur in implanted samples, where the saturation velocity depends on implantation conditions. In gradient propagation saturation occurs at fields an order of magnitude smaller. The saturation velocity is independent of implantation, but overshoot depends strongly on it. No creep was detected. The 180° head-on domain wall between the two layers is found to have little effect on the dynamics of the side walls of the bubble. The motion of the head-on wall is also investigated and its velocity estimated. This head-on wall exhibits a linear mobility and a saturation velocity at high drives.

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Additional Information:© 1979 IEEE. Manuscript received February 12, 1979; revised June 21,1979. This work was supported by the National Science Foundation, Division of Materials Research, under Grant DMR-77-24024.
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Issue or Number:6
Record Number:CaltechAUTHORS:20170807-153116458
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Official Citation:J. Zebrowski and F. Humphrey, "Dynamic behavior of domain walls in double layer self-biasing bubble garnet films," in IEEE Transactions on Magnetics, vol. 15, no. 6, pp. 1915-1921, Nov 1979. doi: 10.1109/TMAG.1979.1060352
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79870
Deposited On:07 Aug 2017 23:11
Last Modified:15 Nov 2021 17:51

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