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By A. H. Eschenfelder

The approval for the 1st variation of this ebook has been very pleasing. It confirms that there's a real desire for a textual content overlaying the magnetic bubble know-how. we're happy that the readers have chanced on that this ebook satisfies that want. it's been used as a textual content for classes in either universities and undefined, and as a reference guide by means of employees lively within the box. to fulfill the necessity for extra copies of the ebook it appeared most efficient to put up a moment version instead of purely a moment printing. there was a few major development, even within the little while because the preliminary printing, and we would have liked to incorporate that. whilst we wish to supply the hot copies on the lowest attainable price so they are extra simply acquired by means of scholars. for that reason the hot variation is in tender conceal and the new growth has been defined in a last bankruptcy instead of integrated into the unique chapters. This removes the cost of resetting and repaging the unique textual content. while updated references were further and typographical mistakes were corrected within the unique chapters. it really is our wish that this variation should be precious to these with an curiosity within the attention-grabbing box of magnetic bubbles.

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13. 3 Fig. 14. ,; 4 3 5 6 8 7 Fig. 15. :;:::~~----___1 3 I 1 4 5 6 h/Q 7 8 9 Fig. 16. dsold eo & 2Ws/(dso + deol vs hll 40 2. 0 Fig. 17. 0 hit. We see that dsold eo is always reasonably close to 3 and Ws is close to the average of deo and dso . In a similar fashion we can use the table to obtain values of H~o/4nMs and H~o/4nMs and plot them vs hit. 25). H~o/4nMs is found the same way except that this time the inverse value, tlh, is located in the Sz column. The results of such a procedure are displayed in Fig.

14] showed that the length and width correlate reasonably well with theory when the energy of the Bloch lines is taken into account. Hard bubbles are not desired in devices and several means have been discovered for suppressing them. The most popular method is to stress the surface layer by ion-implantation of ions (H, He, Ne). 15]. 17, 18]. All of these methods have been successfully used to suppress hard bubbles.

4 Equilibrium Configuration of a Bubble Lattice In order to see the effect of neighboring bubbles it is appropriate to consider the equilibrium configuration of a lattice of bubbles as in Fig. 22. 2 Bubble Domain Configurations 47 Fig. 22. 35d \+--+1 h = 4Q 12 d Q 8 Isolated Bubble d = 8£--- (D Lattice 0=20£ 4 = 00) Fig. 23. 01 the variation of d/I vs HB/41tMs depends on bubble spacing D, as in Fig. 23. The variation of bubble size is depicted in this figure by the size of the spots. The right-hand curve represents the case of the isolated bubble (D = (0) that we have considered before.

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