When we investigated the magnetic structure of a variety of soft-magnetic amorphous ribbons by means of ultra-small-angle neutron scattering (USANSPOL) we were confronted with one particularly interesting Fe65.7Co18Si0.8B15.5 ribbon, provided by VAC Hanau. Due to a special thermal treatment during production a fieldand stress-induced transverse domain texture was expected. Although the USANSPOL...

In this paper, we investigate the effects of slip condition, transverse magnetic field and radiative heat transfer to unsteady flow of a conducting optically thin fluid through a channel filled with porous medium. Exact solution of the governing equations for fully developed flow is obtained in closed form. Detailed computations of the influence of the Grashof number, Hartmann number, slip para...

The stability properties of inviscid protostellar disks are examined taking into account the Hall effect and buoyancy. Depending on the parameters, different types of instabilities can exist in different regions of disks. In a very low ionized region, the instability associated with baroclinic effects of buoyancy is likely most efficient. The Hall-driven shear instability can lead to destabiliz...

A Kerr black hole can flare quasi-periodically, if it is magnetically connected to the accretion disk. The flares extract the rotational energy of the hole. The flaring occurs because the hole twists the magnetic field lines beyond the threshold of the screw instability. Subject headings: black holes – magnetic fields

We present the experimental results based on a novel non-intrusive method for obtaining the magnetic field magnitude profile in a 6-kW Hall thruster operating at the nominal condition. We used the Xe I 6s’[1/2]1 → 6p’[3/2]2 transition at 834.912 nm (vacuum) to perform laser-induced fluorescence spectroscopy inside the channel near the exit plane. Due to the Zeeman effect, the obtained spectra c...

The entanglement at zero-temperature is studied in a two-qubit XZ spin-1/2 chain model in anexternal magnetic field which is applied in the z direction. We have obtained an analytical relation forthe effect of the external magnetic field on the concurrence. It is shown that the ground state of thesystem depends on the strength of exchange coupling. We have shown that the analytical relation oft...

The effect of magnetic field on specific heat of a p-wave spin triplet superconductor has been analyzed. To describe superconductivity we used a single band model with various realizations of p-wave order parameter and analyzed the effect of a Doppler shift in different temperatures.

In this paper, we investigate the effects of small boundary perturbation on the laminar motion of a conducting fluid in a rectangular duct under applied transverse magnetic field. A small boundary perturbation of magnitude ǫ is applied on cross-section of the duct. Using the asymptotic analysis with respect to ǫ, we derive the effective model given by the explicit formulae for the velocity and ...

The electrical resistivity r of three-dimensional amorphous superconducting films a-Mo3Si and a-Nb3Ge is measured in magnetic fields m0H up to 30 T. At low temperatures and at magnetic fields above the upper critical field Hc2, r is temperature independent and decreases as a function of magnetic field. This field dependence is consistent with localization theory in the high-field limit @m0H@\/(...

2014 An experimental study of the magnetic ordering of the proton spin system in Ca(OH)2 is presented. The ordered phase is reached via dynamic nuclear polarization followed by an adiabatic demagnetization in the rotating frame. The spin temperature is negative while the external magnetic field is parallel to the crystalline c-axis. Measurements of the magnetization parallel to the effective ma...