Fabrication and operation of indented angelfish bubble-domain shift register

A clear-view bubble-domain shift register with an angelfish pattern sputter etched into the surface of orthoferrite platelets was fabricated and its operation was demonstrated. For a typical Gd-orthoferrite platelet ∼ 70 μm thick, shift register operation was realized with triangles etched to a depth of ∼ 6 μm with an edge gradient of ∼ 1.3. Specimen preparation and device operation are described.