Abstract
The magnetic bubbles are cylindrical magnetic domains where the direction of magnetization is antiparallel to that of the surrounding area. The magnetic bubble memory devices use the “bubbles” for information storage. This memory has several advantages such as being solid-state, non-volatile, and having very high storage density. Here, we focus on materials for magnetic bubbles. The single crystal-thin films of garnets are used for bubble materials. In order to increase the storage density the bubble diameter should be reduced. The bubble diameter is closely related to the magnetic properties of the garnet film such as saturation induction, anisotropy energy, and exchange constant. The relationship between the film composition and the magnetic characteristics has been described along with the fundamental properties of magnetic bubbles and garnets. The liquid phase epitaxial growth method for preparation of garnet films has also been described.
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