CONDITIONS OF SPIRAL DOMAIN-STRUCTURE STABILITY

An experimental method was developed for creation of static equilibriu m spiral domain with large number of coils. this method allows to stud y the behavior of spiral domain structure (SDS) in thin uniaxial ferri te-garnet films at presence of external constant magnetic field. From the point of view of thermodynamic approach the satisfactory qualitati ve analysis of spiral domain behavior was carried our and SDS stabilit y conditions were predicted. When temperature is changed then there ob served evolution of equilibrium SDS coexisting with another domain pha se. This evolution is caused by the change of spiral domain radial and butt-end pressures.