Domain‐Wall Structure in Permalloy Films

摘要: Domain‐wall structure in Permalloy films the thickness range 25 to 2000 A has been studied by Bitter technique. new type of 180° wall observed: main is cut at regular intervals short, right‐angle ``cross ties'' which terminate free, single ends. The cross‐tie period and length are dependent on film thickness, each becoming shorter with decreasing thickness. These patterns can be understood terms a model for domain walls thin low‐anisotropy material. In conventional atomic moments within rotate about an axis perpendicular wall. such configuration leads large energy contribution from demagnetization factor normal film. model, rotation itself thought give ``corkscrew'' spins decrease associated magnetostatic energy. Of several experiments have performed s...