Fabrication and Operation of Indented Angelfish Bubble-Domain Shift Register

A clear-view bubble-domain sfift 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. Copyright © 1973 by The Institute of Electrical and Electronics Engineers, Inc.