A method and apparatus for creation of cylindrical, single wall domains in selected locations in a magnetic sheet, such as orthoferrite or garnet films. A bias (stabilizing) magnetic field is applied normal to the magnetic sheet to saturate the sheet in one direction so that no reversely magnetized domains are present in the storage area. A localized magnetic field normal to the magnetic sheet but oppositely directed with respect to the bias field is then created. This localized field is produced by the action of an in-plane field and a bar of magnetic material on the sheet, or by a small current loop. The bias field is then reduced until a domain in nucleated at the site of the localized field. The domain will nucleate when the net reversely directed local field is greater than the nucleation field Hn at that location. The bias field is then increased to regulate the diameter of the domain produced. Means are provided to create a variable bias field normal to the sheet and to create an oppositely directed variable localized field at selected locations in the shett.