Two-dimensional Whole Space Transient Electromagnetic Forward Response of Magnetic Moment in Arbitrary Direction

We have studied the behaviour of a charged particle in an axially symmetric magnetic field having a neutral point, so as to find a possibility of confining a charged particle in a thermonuclear device. In order to study the motion we have reduced a three-dimensional motion to a two-dimensional one by introducing a fictitious potential. Following Schmidt we have classified the motion, as an ‘off-axis motion’ and ‘encircling motion’ depending on the behaviour of this potential. We see that the particle performs a hybrid type of motion in the negative z-axis, i.e. at some instant it is in ‘off-axis motion’ while at another instant it is in ‘encircling motion’. We have also solved the equation of motion numerically and the graphs of the particle trajectory verify our analysis. We find that in most of the cases the particle is contained. The magnetic moment is found to be moderately adiabatic.

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Magnetic quantum oscillations in doped antiferromagnets

International Journal of Modern Physics B ◽

10.1142/s0217979217450151 ◽

2017 ◽

Vol 31 (25) ◽

pp. 1745015

Author(s):

V. V. Kabanov

Keyword(s):

Magnetic Field ◽

Polar Angle ◽

Two Dimensional ◽

Plane Angle ◽

Arbitrary Direction ◽

Magnetization Direction ◽

Quantum Oscillations ◽

Out Of Plane ◽

Plane Direction ◽

Magnetic Quantum Oscillations

Energy spectrum of electrons (holes) doped into two-dimensional (2D) antiferromagnetic (AF) semiconductors is quantized in an external magnetic field of arbitrary direction. A peculiar dependence of de Haas–van Alphen (dHvA) magneto-oscillation amplitudes on the azimuthal in-plane angle from the magnetization direction and on the polar angle from the out-of-plane direction is found. The angular dependence of the amplitude is different if the measurements are performed in the field above and below of the spin-flop field.

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Width-dependent structural stability and magnetic properties of monolayer zigzag MoS2 nanoribbons

Modern Physics Letters B ◽

10.1142/s0217984917500178 ◽

2017 ◽

Vol 31 (03) ◽

pp. 1750017 ◽

Cited By ~ 7

Author(s):

Yan-Ni Wen ◽

Peng-Fei Gao ◽

Xi Chen ◽

Ming-Gang Xia ◽

Yang Zhang ◽

...

Keyword(s):

Density Functional Theory ◽

Magnetic Properties ◽

Structural Stability ◽

Magnetic Moment ◽

First Principles ◽

Density Functional ◽

Electronic States ◽

Two Dimensional ◽

Functional Theory ◽

Proportional Relationship

First-principles study based on density functional theory has been employed to investigate width-dependent structural stability and magnetic properties of monolayer zigzag MoS2 nanoribbons (ZZ-MoS2 NRs). The width N = 4–6 (the numbers of zigzag Mo–S chains along the ribbon length) are considered. The results show that all studied ZZ-MoS2 NRs are less stable than two-dimensional MoS2 monolayer, exhibiting that a broader width ribbon behaves better structural stability and an inversely proportional relationship between the structural stability (or the ribbon with) and boundary S–Mo interaction. Electronic states imply that all ZZ-MoS2 NRs exhibit magnetic properties, regardless of their widths. Total magnetic moment increases with the increasing width N, which is mainly ascribed to the decreasing S–Mo interaction of the two zigzag edges. In order to confirm this reason, a uniaxial tension strain is applied to ZZ-MoS2 NRs. It has been found that, with the increasing tension strain, the bond length of boundary S–Mo increases, at the same time, the magnetic moment increases also. Our results suggest the rational applications of ZZ-MoS2 NRs in nanoelectronics and spintronics.

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Diffusion Law of Whole-Space Transient Electromagnetic Field Generated by the Underground Magnetic Source and Its Application

IEEE Access ◽

10.1109/access.2019.2916767 ◽

2019 ◽

Vol 7 ◽

pp. 63415-63425 ◽

Cited By ~ 2

Author(s):

Jianghao Chang ◽

Jingcun Yu ◽

Juanjuan Li ◽

Guoqiang Xue ◽

Reza Malekian ◽

...

Keyword(s):

Electromagnetic Field ◽

Transient Electromagnetic ◽

Magnetic Source ◽

Whole Space

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On the diffraction of an electromagnetic pulse by a wedge

Proceedings of the Royal Society of London Series A - Mathematical and Physical Sciences ◽

10.1098/rspa.1952.0101 ◽

1952 ◽

Vol 212 (1111) ◽

pp. 547-551 ◽

Cited By ~ 2

Keyword(s):

Plane Wave ◽

Boundary Value Problem ◽

Potential Theory ◽

Electromagnetic Pulse ◽

Boundary Value ◽

Electromagnetic Disturbance ◽

Two Dimensional ◽

Arbitrary Polarization ◽

Transient Electromagnetic ◽

Classical Means

The diffraction by a conducting wedge of a transient electromagnetic disturbance in the form of a plane wave discontinuity having arbitrary polarization and direction of propagation is reduced to a pair of two-dimensional scalar problems. The solution to one of these is identical with that previously obtained for the analogous acoustical problem, while the second is attacked in a similar manner, using a Tschplygin transformation to reduce the boundary value problem to one in potential theory, which is then solved by classical means.

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A finite‐element solution for the transient electromagnetic response of an arbitrary two‐dimensional resistivity distribution

Geophysics ◽

10.1190/1.1442193 ◽

1986 ◽

Vol 51 (7) ◽

pp. 1450-1461 ◽

Cited By ~ 25

Author(s):

Y. Goldman ◽

C. Hubans ◽

S. Nicoletis ◽

S. Spitz

Keyword(s):

Finite Element ◽

Sparse Matrix ◽

Equation System ◽

Electromagnetic Response ◽

Implicit Time ◽

Two Dimensional ◽

Time Step ◽

Transient Electromagnetic ◽

Exact Boundary ◽

The Time Domain

We present a numerical method for solving Maxwell’s equations in the case of an arbitrary two‐dimensional resistivity distribution excited by an infinite current line. The electric field is computed directly in the time domain. The computations are carried out in the lower half‐space only because exact boundary conditions are used on the free surface. The algorithm follows the finite‐element approach, which leads (after space discretization) to an equation system with a sparse matrix. Time stepping is done with an implicit time scheme. At each time step, the solution of the equation system is provided by the fast system ICCG(0). The resulting algorithm produces good results even when large resistivity contrasts are involved. We present a test of the algorithm’s performance in the case of a homogeneous earth. With a reasonable grid, the relative error with respect to the analytical solution does not exceed 1 percent, even 2 s after the source is turned off.

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