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Wall structure changes in low-loss magnetic bubble materials

MacNeal, Bruce E. and Humphrey, Floyd B. (1977) Wall structure changes in low-loss magnetic bubble materials. IEEE Transactions on Magnetics, 13 (5). pp. 1348-1350. ISSN 0018-9464. doi:10.1109/TMAG.1977.1059569.

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Transitions between underdamped and overdamped radial motion in magnetic bubble domains are investigated in a low-loss rare-earth garnet material. Three distinct types of domain wall structures, which are present during underdamped motion, have been identified. Bubble walls were subjected to a bias field pulse (H) and tested for underdamped motion sometime (τ) later. The first type of structure follows the form H = H' exp (τ\τ_0), with 170 nsec < τ_0 < 270 nsec for the first transition, and is not statically stable. Transitions associated with the second type are characterized by a constant critical angle Ψ_c between the magnetization in the middle of the wall, and the plane of the wall. For the first transition, Ψ_c = 230°, and for the second, Ψ_c = 370°. These structures are statically stable. The third type of structure is not statically stable, and H is independent of τ. The first and second wall structure types are associated with multiple transitions while the third only exhibits a single transition.

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Additional Information:© 1977 IEEE. Supported in part by National Science Foundation Division of Materials Research Grant #DMR75-00420-A02.
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Issue or Number:5
Record Number:CaltechAUTHORS:20170808-142903551
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Official Citation:B. MacNeal and F. Humphrey, "Wall structure changes in low-loss magnetic bubble materials," in IEEE Transactions on Magnetics, vol. 13, no. 5, pp. 1348-1350, September 1977. doi: 10.1109/TMAG.1977.1059569
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:79955
Deposited On:09 Aug 2017 18:17
Last Modified:15 Nov 2021 17:51

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