Rotation Effects on the Isothermal Growth of (Eu,Y)₈(Fe,Ga)₅O₁₂ Magnetic Bubble Films by Liquid Phase Epitaxy

Abstract

An isothermal liquid phase epitaxy dipping technique for the growth of garnet films from PbO‐B2O2‐Fe2O3 fluxed melts was studied. Films were grown on Gd3Ga5O12 substrates which were rotated axially while being held in a horizontal plane. To a first approximation, the film growth rate varies with the square root of rotation rate (r), as predicted by diffusion boundary‐layer theory. This rotation effect is modified by the interfacial reaction which involves the integration of garnet constituent units into the growth surface of the film. By holding all growth parameters constant except for changing r from 36 to 169 rpm, the film composition and magnetic properties can be changed. Lead impurity content, lattice mismatch, magnetic anisotropy, and saturation magnetization increase with increasing rotation up to a limiting r >121 rpm. Thereafter, these properties decrease with increasing r, presumably as a result of a growth interface instability. Copyright © 1973, Wiley Blackwell. All rights reserved