Properties and Device Applications of Magnetic Domains in Orthoferrites

Recently, P. C. Michaelis described a technique for propagating isolated magnetic domains in thin anisotropic ferromagnetic films. 1 He obtained controlled motion along either the easy (e) or hard (h) anisotropy axis although he used distinctly different mechanisms to obtain propagation in these directions. Michaelis' ferromagnetic films were processed to have a uniaxial anistropy (i.e., hard and easy axis) in the plane of the film. Magneti1901 1902 T H E BELL SYSTEM TECHNICAL J O U R N A L , OCTOBER 1967 Fig. 1 -- An isolated magnetic domain can be moved along the easy (e) or the hard (h) anisotropy axis.