Transformation of the polarization of the electromagnetic waves reflected from the layered superconductors in an external dc magnetic field

2016 ◽  
Vol 42 (10) ◽  
pp. 916-923 ◽  
Author(s):  
T. N. Rokhmanova ◽  
S. S. Apostolov ◽  
Z. A. Maizelis ◽  
V. A. Yampol'skii
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Waves ◽  
Layered Superconductors ◽  
Dc Magnetic Field

Convective laser filamentation instability in magnetized plasma

2014 ◽  
Vol 92 (6) ◽  
pp. 504-508 ◽  
Author(s):  
M.S. Bawa’aneh ◽  
Ghada Assayed ◽  
M.R. Said ◽  
S. Al-Awfi
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Waves ◽  
Amplification Factor ◽  
Magnetized Plasma ◽  
Governing Equations ◽  
Equilibrium Plasma ◽  
Dc Magnetic Field ◽  
Density Values ◽  
Filamentation Instability ◽  
The Magnetic Field

The convective amplification of filamentation instability (FI) of electromagnetic waves traveling along the density ramp of a magnetized plasma is investigated. The generalized amplification factor of the instability in the presence of a DC–magnetic field is derived by obtaining the governing equations of the instability and using the slow-coupling technique to obtain an analytical expression for the amplification factor in weakly magnetized plasma. The result shows enhancement of the convective FI gain by the magnetic field, where the enhancement is stronger for lower equilibrium plasma density values.

Penetration of RF Electromagnetic Field through Thin Films of La0.67Sr0.33MnO3 Manganite

2009 ◽  
Vol 152-153 ◽  
pp. 123-126
Author(s):  
A. Nosov ◽  
A. Rinkevich ◽  
I. Gribov ◽  
N. Moskvina ◽  
V. Vassiliev ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Experimental Data ◽  
Electromagnetic Waves ◽  
Magnetic Ordering ◽  
Electromagnetic Properties ◽  
Local Dynamic ◽  
Frequency Range ◽  
Frequency Limit ◽  
Dc Magnetic Field

Peculiarities of penetration of electromagnetic waves through the bulk and thin film samples of the La0.67Sr0.33MnO3 manganite were investigated for the frequency range from 50 kHz to 20 MHz. Strong variations of penetration coefficient in the applied dc magnetic field were observed both for ferromagnetic and paramagnetic states. Local dynamic magnetic ordering in the paramagnetic temperature range was observed. The experimental data reveal weak dependence of electromagnetic properties on microstructure of the films. The upper frequency limit of the dynamic polaron correlations in the paramagnetic phase was estimated.

scholarly journals Modification of transfer-matrix method for electromagnetic waves in layered superconductor in presence of dc magnetic field

2019 ◽  
Keyword(s):  
Magnetic Field ◽  
Transfer Matrix ◽  
Transfer Matrix Method ◽  
Matrix Method ◽  
Electromagnetic Waves ◽  
Variable Parameter ◽  
Layered Superconductor ◽  
Legendre Functions ◽  
Magnetic Vortices ◽  
Dc Magnetic Field

In the present paper, we modify the transfer-matrix method to study the dissipation-free transition of electromagnetic waves of terahertz range through a plate of layered superconductor embedded in the dielectric environment in the presence of external direct current (dc) magnetic field. In this work, we сonsider TM-polarized electromagnetic waves. The setup is arranged in such a way that the dielectric and superconducting layers in the plate are perpendicular to its interface, and the external magnetic field is directed along the plate and parallel to the layers. We consider the case of a weak external dc field at which magnetic vortices do not penetrate the plate. Due to the nonlinearity of the Josephson plasma formed in the layered superconductor, the dc magnetic field penetrates non-uniformly into the plate and affects the electromagnetic wave. Hence, the magnitude of the external dc magnetic field can be used as a variable parameter to tune various phenomena associated with the propagation of an electromagnetic waves in layered superconductors. In the presence of the external homogeneous dc magnetic field, linear electromagnetic waves in the layered superconductor turn out to be non-exponential. Therefore we cannot directly apply the transfer matrix method, in which the amplitudes of the corresponding exponents are compared. However, in the present paper, it is shown that for a sufficiently thick plate, the matrices describing the wave transfer through the plate can be introduced. The analytical expressions for these matrices are derived explicitly in terms of special Legendre functions. The obtained transfer-matrices can be used for the further study of the wave transfer through the layered superconductor in the presence of an external dc magnetic field.

scholarly journals Collisional and resonance absorption of electromagnetic waves in a weakly collisional, inhomogeneous magnetoplasma slab

2020 ◽  
Vol 9 (2) ◽  
pp. 25-30
Author(s):  
F. Rawwagah ◽  
M. Al-Ali ◽  
A. Al-Khateeb ◽  
M. Bawa'aneh
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Waves ◽  
Electron Cyclotron Resonance ◽  
Cyclotron Frequency ◽  
Low Frequency ◽  
Electron Cyclotron ◽  
The Body ◽  
Absorption Bands ◽  
Dc Magnetic Field ◽  
Frequency Branch

Absorbance of normally incident electromagnetic wave on a cold, weakly collisional, and inhomogeneous magnetoplasma slab is investigated. The plasma density is Budden-like sinusoidal profile, where the inhomogeniety is treated as a multilayered system of homogeneous sub-cells within the transfer matrix technique. For incident wave frequencies much above the ion cyclotron frequency, only right hand circularly polarized waves are relevant for wave propagation parallel to a static magnetic field. Calculations are performed in normalized parameters, that make the results suitable for many applications including atmospheric and laboratory plasmas. The presence of the dc-magnetic field leads to the formation of two absorption bands explained by plasma collisional dissipation and electron cyclotron resonance in the low frequency branch of the $R$-wave below the electron cyclotron frequency. The transmittance shows the emergence of the low frequency electron cyclotron wave, which becomes a Whistler mode at very low frequency. More detailed discussion on the effect of plasma collisionality, inhomogeneity, and dc-magnetic field on the propagation characteristics is given at the relevant place within the body of the manuscript.

Transmission of terahertz waves through layered superconductors controlled by a dc magnetic field

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
S. S. Apostolov ◽  
Z. A. Maizelis ◽  
N. M. Makarov ◽  
F. Pérez-Rodríguez ◽  
T. N. Rokhmanova ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Terahertz Waves ◽  
Layered Superconductors ◽  
Dc Magnetic Field
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