In experimental study confirmed the acceleration of wound healing and forming normotrophic scars tissue in laboratory animals using the transdermal administration of blood plasma 0 (I) by pulsed ...electrophoresis under the influence of an external magnetic field. It was established that the method proposed by the authors prevents the development of hypertrophic and keloid scars, and also stimulates tissue regeneration in the surgical area due to the activation of local regeneration processes.
The intensity asymmetry of the secondary emission spectra of thin iron films on W(110) excited by spin-polarized electrons was measured at various geometrical arrangements and various primary ...energies. The magnitude and shape of the Stoner excitation asymmetry provide information on the magnetic state of the film. The geometrical structure of the film influences its magnetism and this is reflected in the asymmetry of the spin polarized electron energy loss spectra (SPEELS). Oxygen adsorption reduces the asymmetry of Stoner excitations, but not as dramatically as in studies of Ni surface. The kinematics of the scattering process influences the asymmetry of the spectra and should be taken into account while using SPEELS for studying surface magnetism. Theoretical analysis of asymmetry spectra measured at various scattering conditions is required.
•SPEELS of iron films were measured at various geometries and primary energies.•The geometrical structure of the films influences the asymmetry of SPEELS.•Oxygen adsorption reduces the asymmetry of Stoner excitations.•The kinematics of the scattering process influences the asymmetry of SPEELS.
The spectral distribution of parametrically excited dipole-exchange magnons in an in-plane magnetized epitaxial film of yttrium-iron garnet was studied by means of frequency- and wavevector-resolved ...Brillouin light scattering spectroscopy. The experiment was performed in a parallel pumping geometry, where an exciting microwave magnetic field was parallel to the magnetizing field. It was found that for both dipolar and exchange spectral areas parallel pumping excites the lowest volume magnon modes propagating in the film plane perpendicularly to the magnetization direction. No excitation of the high-order volume modes has been registered. In order to interpret the experimental observations, we used a microscopic Heisenberg model that includes exchange as well as dipole-dipole interactions to calculate the magnon spectrum and construct the eigenstates. As proven in our calculations, the observed magnons are characterized by having the highest possible ellipticity of precession, which suggests the lowest threshold of parametric generation. Applying different pumping powers we observe modifications in the magnon spectrum that are described theoretically by a softening of the spin stiffness.
We have studied the field evolution of spin waves frequency in a dense array of dipolarly interacting magnetic stripes of alternating widths during the magnetization reversal process by Brillouin ...light scattering technique. This represents a model system of a one-dimensional magnonic crystal which can sustain collective spin excitations. Their frequencies have been accounted for by a simple analytical approach when all the stripes are in the coaligned magnetization state. Each excitation of the array observed in the magnetically saturated state splits into either a doublet or a triplet in the field range where the inversion of the stripe magnetization takes place. This has been interpreted as due to the simultaneous presence, within the probed region, of clusters of adjacent stripes with either parallel or antiparallel magnetization.
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