Effect of misorientation on growth anisotropy in [111]-oriented garnet films

Abstract

Phenomenological anisotropy constants have been measured in three garnet bubble films with their surface normal slightly misoriented from the crystallographic [I11] direction. A tilted magnetic easy axis is found from measurements of homogeneous nucleation and bubble collapse in the presence of in-plane fields. An in-plane anisotropy is also found whose axes do not in general lie either normal to or in the easy-axis tilt plane. These results are shown to be consistent with a phenomenological growth anisotropy model which includes the film plane misorientation.

The effect of substrate misorientation on the magnetic properties; of epitaxial garnet films

“…The find terms in equation ( 4) are an orthorhombic contribution to the energy. Both the expressions (4) and ( 5) are similar to those derived by Malozemoff and DeLuca (1974), who used a modified form of (1) but adopted a less general approach.…”

“…Experiments on these orientation effects using a different method have also been reported by Malozemoff and DeLuca (1974), who found it necessary to use three growth parameters, A , B1 and Bz, to explain their results. The present work allows for the cubic anisotropy, but further work is required to determine A and B before the quantitative agreement of our results can be checked.…”

High-speed photography of topological switching and anisotropic saturation velocities in a misoriented garnet film

“…Such a misorientation can give rise to an in-plane anisotropy Kp, by the same growth anisotropy process which gives rise to the uniaxial anisotropy Ku. According to theory (Malozemoff and DeLuca 1974)…”

Properties of epitaxial (210) iron garnet films exhibiting the magnetoelectric effect

“…These films served as the main working medium for bubble based devices at the initial stage of their devel opment [1,2]. Note that EA exactly coincides with the normal only if the [111] or [100] axis does not deviate from n. If this condition is not met, a weak orthorhom bic anisotropy component appears and EA deviates from the normal through an angle that can substan tially exceeds the angle between n and these axes [9][10][11][12]. In the general case, the position of the axes that are perpendicular to EA and characterize the orthor hombic anisotropy is not related to crystallographic axes.…”