PECULIARITIES OF MAGNETIZATION OF GARNET-FILMS (210)

Epitaxial garnet films grown on a GGG substrate with an orientation (210) have orthorhombic anisotropy and are considered as a uniaxial magnetics with an easy axis tilted from a direction perpendicular to the film surface at an angle THETA(o) almost-equal-to 30-degrees. Such films have an oriented stripe domain structure. Their magnetization is carried out by a displacement of 180-degrees domain walls under the influence of both bias and inplane magnetic fields. A magnetic susceptibility tensor is proposed determined by the effective demagnetizing factor and the angle THETA(o). The critical dependences of the nucleation field and of the collapse field have been obtained. The magnetizing curves obtained in a bias or in an in-plane field are shifted by applying an additional orthogonal dc-field. Simple techniques of the determination of the easy axis orientation and of the saturation magnetization value are presented.