Slow fluctuations in the cyclical magnetic reversal of thin magnetic films
Slow fluctuations in the cyclical magnetic reversal of thin magnetic films
A.M. Buz'ко, V.Y. Potemkin
A theoretical analysis is made of noise of type $1/f^{\alpha}$ arising in the cyclical - magnetic reversal of ferromagnetic films. On the basis of the idea that, in the course of magnetic reversal without saturation of the sample, there is slow variation in the magnitude of the film; volume undergoing magnetic reversal per cycle and also its "switching" moments, an expression is found for the spectral density of the fluctuations of the magnetization, describing the rise in spectral density of the magnetic noise close to frequencies which are multiples of the pumping frequency.
Show AbstractSome periodicities of atmospheric circulation
Some periodicities of atmospheric circulation
A.Kh. Khrgian, E.D. Astakhova
On the basis of generalization of much statistical material, the periodicity of atmospheric circulation is studied in various regions of the terrestrial globe at three basic isobaric surfaces (10, 30, and 500 mbar). It is shown that zonal circulation varies with a period of 27 days at the 10- and 30-mbar levels and with a period of 25 days at all the levels investigated. An attempt is made to explain a series of the results obtained on the basis of the hypothesis of solar action on the atmospheric circulation and also taking account of the superposition of oscillations.
Show AbstractEquations of motion of the two-body problem with variable masses
Equations of motion of the two-body problem with variable masses
L.G. Luk'yanov
The question of reducing the equations of the general problem to the equations of relative motion is considered. The most general form of the equations of relative motion is obtained using the momentum integral.
Show AbstractElectromodulation spectra of high-resistance p and n GaAs doped with chromium
Electromodulation spectra of high-resistance p and n GaAs doped with chromium
V.A. Morozova, V.V. Ostroborodova
From the electromodulation spectra of high-resistance p and n GaAs doped with chromium, the ionization energies of the acceptor levels of chromium are determined. They are $\varepsilon_{1 A V}= 0,61\pm 0,01$ eV and $\varepsilon_{2 A V} = 0,870 \pm 0,005$ eV and are independent of the temperature in the range 80-300K.
Show AbstractRelativistic inert-mass tensor
Relativistic inert-mass tensor
G.Yu. Bogoslovskii
Within the framework of the relativistic theory of anisotropic space - time, an explicit expression is found for the relativistic inert-mass tensor in terms of the field values determining the local spatial anisotropy and the isolated direction. Here, in accordance with the initial idea of Dicke, the dependence of the inertia on the localization of the body and the direction in space is found to be universal, and identical for all bodies that are in identical states.
Show AbstractMatching of high-Q gravitational antenna with the resonator of a capacitative oscillation transducer
Matching of high-Q gravitational antenna with the resonator of a capacitative oscillation transducer
A.D. Kochubei, V.P. Mitrofanov
A capacitative oscillation transducer of parametric type with VHF pumping is used to measure the limitingly small antenna oscillations in a gravitational-wave experiment. A matching scheme for a high Q antenna and a transducer resonator that is stable to seismic perturbation is considered.
Show AbstractFree parameter of spinel structure and M$\stackrel{..}{o}$ssbauer lineshift
Free parameter of spinel structure and M$\stackrel{..}{o}$ssbauer lineshift
V.I. Nikolaev, V.S. Rusakov, N.I. Chistyakova
The dependence of the M$\stackrel{..}{o}$ssbauer lineshift $\delta$ in oxygen ferrite - spinels on the free parameter of the structure u is considered. It is shown that the mutual disposition of the lines for the A and B points in the spectrum depends significantly on the oxygen parameter u. Within the framework of the field theory of ligands, theoretical dependences are obtained for the difference in the shifts $\Delta\delta^{ВА} = \delta^B — \delta^A$ as a function of u, at various values of the lattice parameter a. This difference is expedient for comparison with experimental data, since it does not depend on the choice of radiation source and scarcely depends on a. The available experimental data for ferrite - spinels with $Fe^{3+}$ ions at points A and B are found to be in agreement with the results of the calculations. In particular, the trend of the difference $\Delta\delta^{BA}$ to sign reversal with rise in u is confirmed. According to the results of the calculations, sign reversal should be observed at $u= u_{кр} = 0.3845$ for the case when $a=8.30 \stackrel{o}{A}$.
Show AbstractSelf-correlation functions of rotational and translational motion in simple fluids
Self-correlation functions of rotational and translational motion in simple fluids
O.P. Revokatov, N.V. Brilliantov
A model in which the motion of a molecule is regarded as a sequence of free paths and strong multiparticle collisions is proposed. The result of collision is characterized by conditional probability functions. The analytical expressions obtained for the self-correlation functions are in good agreement with machine experiments.
Show AbstractTheory of radiation in media with changing anisotropy
Theory of radiation in media with changing anisotropy
V.A. Davydov
The radiation of a charge moving in a crystal with periodic change in direction of the optical axis over time is considered. Polarizational, angular, and spectral characteristics of the radiation are obtained and investigated.
Show AbstractApproximating-Hamiltonian method and the generalized Mayer theorem
Approximating-Hamiltonian method and the generalized Mayer theorem
A.P. Bakulev
A generalization of the Mayer theorem and its application to the approximating-Hamiltonian method are considered; an improved estimate is derived for the closeness of the free energies of the model and approximating systems; the advantages of the approach developed here is discussed for the example of a specific model.
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