Аннотация
We present the results of studying of dynamic properties of cylindrical magnetic domains (CMD) in chip elements such as junctions of generation, channels of promotion and reading of CMD. We have identified the features of nucleation and collapse of single domains in elements of generation and reading. Domain containing material is an epitaxial ferrite-garnet film (EFGP) of (Y, Sm, Lu, Ca)3 × (Fe, Ga)5O12 with the following parameters: the collapse field H0 = 105 Oe, field elliptical instability H2 = 80 Oe, the anisotropy field На = 1200 Oe, saturation magnetization Ms =210 Gs, the Curie temperature Тс = 410К, film thickness 4.8 µm. EFGP of such a composition has both the color contrast of domain structures, which allows reliably fix the CMD position down to its smallest diameter (2.2 µm) in the state before collapse, and good dynamic characteristics, such as the speed limit of the CMD (velocity saturation) Vs = 20 m/s and their mobility μ = 5 m/s×Oe. A reason restricting the region of the chip stable operation is a reading junction. A tend to increasing of magnetoresistive effect at room temperatures and magnetic fields 50–150 Oe is found.