To observe the magneto-optic (MO) recording domains precisely it is necessary to erase noise and overcome poor contrast. By applying image averaging and subtracting nonmagnetic contrast in digital image processing system, the sharp domain image can be obtained. This is the first time the domain image has been combined with morphological signal processing. By using mathematical morphology in the processing algorithms, the nonmagnetical contrast (background image) can be generated from a real image directly. Subtracting it from the real image, the target domains can be segmented and enhanced.

Articles you may be interested inEffect of diamagnetic substitution on growthinduced anisotropy in (YBi)3Fe5O1 2 J. Appl. Phys. 60, 718 (1986); 10.1063/1.337419Growthinduced anisotropy and damping versus temperature in narrow linewidth, 1μm YIG(Bi,Ca,Si) bubble filmsIn this study the mechanism causing growth-induced anisotropy Kug in YBiCaGeSi-IG has been discussed and elucidated using the stepwise regression method by computer. In the stepwise regression analysis of a lot of the experimental data, we take K ug as a dependent variable Y, and Bi content, growth temperature T g , film growth rate V g , film thickness h, saturation magnetization 4TrMs, rotation rate of substrates, Y content as predictors, X I , X 2' X 3' X 4' X 5' X 6' X 7 , respectively. In our experiments, Bi content and saturation magnetization 41TMs of the samples were changed from 0.20 to 0.42 and from 330 G to 1008 G, respectively. When F-to-enter threshold F = 0.5, 1,2,3,4, the regression Eq. (3) is obtained as follows:where mUltiple correlation coefficient R = 0.86, standard error S3 = 0.675 X 1if. Since F= 15.6>F oo1 (2,11) = 7.21 for the regression Eq. (3), it is significant at a = 0.01 level of significance. This shows that there is an approximate linear relation between growth-induced anisotropy Kug and Bi content in films, and saturation magnetization 41TMs in YBiCaGeSi-IG material.

In our work, channeling effects on bubble propagation for 8-μm-period ion-implanted propagation patterns (I2P2) using the (YBiCa)3 (FeGeSi)5O12 bubble material have been found and studied. The best propagation patterns have been designed in the form of a snake in the experiments. Several kinds of ion sources have been used, such as N-N, N-Ne, Ne-Ne. The effects of injection angles and doses on propagation characteristics will be discussed in this paper. Owing to use of the channeling effects, even if energy does not exceed 200 keV, bubble quasi-static propagation has been realized successfully in N-N, N-Ne, Ne-Ne ion implantation experiments. N-N ion implantation produces better effects for quasi-static propagation with wider margins (30 Oe) of minor loops than the others.