Computer simulation of the operation of a magnetic bubble domain propagation circuit modeled after a current-access device

Author

Hayashi, Nobuo

Author_Institution

University of Electro-Communications, Tokyo, Japan.

Volume

18

Issue

4

fYear

1982

fDate

7/1/1982 12:00:00 AM

Firstpage

933

Lastpage

940

Abstract

The operation of a bubble-domain straight-line propagation circuit has been simulated successfully. This simulation has been achieved by our approximating the motion of an s = 0 frozen-azimuth bubble placed under a drive field $H_{Z}(X, Y, T)= -H_{p} \\cdot \\cos [2\\pi(X/R_{X} - n(T)/4)] \\cdot \\exp [-(Y/R_{Y})^{2}]$ . The simulation has been generated from a previously developed numerical scheme to simulate the motion of a bubble, whose domain shape and magnetization structure along its domain wall were variable. The drive field has been modeled after a dual conductor-sheet, current-access propagation structure, which has a bit period RXand a transverse width on the order of $2R_{Y}$ . The entire field contour has been advanced stepwise in the positive $X$ direction by an increase of the integer $n(T)$ , which represents the drive-phase number. The bubble motion has been observed during the first six drive phases to produce operating margin diagrams for drive frequencies of 250 KHz, 796 KHz and 1 MHz. The method of calculation and the results of the simulation are given.

Keywords

Magnetic bubble circuits; Circuit simulation; Computational modeling; Computer simulation; Frequency; Magnetic circuits; Magnetic devices; Magnetic domains; Magnetization; Numerical simulation; Shape;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.1982.1061952

Filename

1061952