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High-frequency propagation and failure of asymmetric half-disk field access magnetic bubble device elements

Gal, Lazlo and Humphrey, Floyd B. (1979) High-frequency propagation and failure of asymmetric half-disk field access magnetic bubble device elements. IEEE Transactions on Magnetics, 15 (4). pp. 1113-1120. ISSN 0018-9464. https://resolver.caltech.edu/CaltechAUTHORS:20170807-153954438

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Abstract

High-frequency propagation characteristics and failure modes in 14-μm period, 1.8-μm gap, asymmetric half-disk field-access device were studied using a high-speed optical sampling technique. Propagation elements as well as normal and hand gun corners and chevron structures were included. The operating bias margin at 1MHz, for a structure that had 1.2 MHz as highest possible frequency, was about half of the margin for frequencies of 200 kHz and below. The phase lag between the bubble leading wall and the instantaneous rotating field direction was nearly 90° as the bubble moved through the center of the element where the lag was the greatest. The peak velocity of the leading wall of 55 m/s and the trailing wall of 46 m/s is attributed to bubble interaction with the Permalloy structure creating a ∼125 Oe in-plane field that greatly increases the free bubble "saturation" velocity.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1109/TMAG.1979.1145873DOIArticle
http://ieeexplore.ieee.org/document/1145873/PublisherArticle
Additional Information:© 1979 IEEE. Manuscript received December 1, 1978; revised February 26, 1979. This work was supported by the National Science Foundation Division of International Programs under Grant INT 76-02666 and by the Division of Materials Research under Grant DMR-77-2402.
Funders:
Funding AgencyGrant Number
NSFINT 76-02666
NSFDMR-77-2402
Issue or Number:4
Record Number:CaltechAUTHORS:20170807-153954438
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20170807-153954438
Official Citation:L. Gal and F. Humphrey, "High-frequency propagation and failure of asymmetric half-disk field access magnetic bubble device elements," in IEEE Transactions on Magnetics, vol. 15, no. 4, pp. 1113-1120, Jul 1979. doi: 10.1109/TMAG.1979.1145873
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79873
Collection:CaltechAUTHORS
Deposited By: Kristin Buxton
Deposited On:07 Aug 2017 23:10
Last Modified:03 Oct 2019 18:25

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