Initiating stripe domains in Bloch line memory

In order to form the 100 % grooving to stabilize multiple stripe domains in parallel, the LPE garnet film was chemically etched using hot conc phosphoric acid. The width and length of the grooved regions are around 3 μm and 100 μm respectively, and they were aligned in parallel at a period of around 12 μm for a 5 μm bubble garnet film. After generating bubbles and stretching them through the non-grooved region, these stripes were chopped at both sides of the grooving. The resulting stripe domain walls enclose the grooved region, and are stabilized by the magneto-static effect from the grooved edge, which is vitally important for field access Bloch line propagation in Bloch line memory.