The stability of domain wall configurations with cylindrical symmetry

1975 ◽  
Vol 8 (1) ◽  
pp. L9-L11
Author(s):  
M I Darby ◽  
B K Middleton
Keyword(s):  
Domain Wall ◽  
Cylindrical Symmetry ◽  
The Stability

Gravitational domain wall and stability with some symmetry algebra

2020 ◽  
Vol 17 (14) ◽  
pp. 2050208
Author(s):  
S. Toni ◽  
J. Sadeghi ◽  
O. Jalili
Keyword(s):  
Differential Equation ◽  
Domain Wall ◽  
Commutation Relation ◽  
Physical System ◽  
Symmetry Algebra ◽  
Second Step ◽  
Gravitational System ◽  
The Stability ◽  
Heun’S Equation ◽  
Usual Commutation Relation

In this paper, first, we will try to introduce the gravitational domain wall as a physical system. In the second step, we also introduce the Hun differential equation as a mathematical tools. We factorize the known Heun’s equation as form of operators [Formula: see text], [Formula: see text] and [Formula: see text]. Then we compare the differential equation of gravitational domain wall with corresponding Hun equation. In that case the above-mentioned operators can be obtained for the gravitational system by the comparing process. Finally, we employ such operators and achieve the corresponding symmetry algebra with the usual commutation relation of operators to each other. Here, by having such operators, we investigate the stability of system.

The stability of steady motion of magnetic domain wall: Role of higher-order spin-orbit torques

2015 ◽  
Vol 118 (22) ◽  
pp. 223901 ◽  
Author(s):  
Peng-Bin He ◽  
Han Yan ◽  
Meng-Qiu Cai ◽  
Zai-Dong Li
Keyword(s):  
Domain Wall ◽  
Steady Motion ◽  
Magnetic Domain ◽  
Higher Order ◽  
Spin Orbit ◽  
Magnetic Domain Wall ◽  
The Stability

Study the Stability of 360-Degree Transverse Domain-Wall in a Magnetic Wire

2016 ◽  
Author(s):  
Yee-Mou Kao ◽  
Lung-Shiang Tsai ◽  
Deng-Shiang Shiu ◽  
Kuo-Chan Huang ◽  
Lance Horng
Keyword(s):  
Domain Wall ◽  
Magnetic Wire ◽  
The Stability

scholarly journals Mass of dusty clumps with temperature and density structure

2019 ◽  
Vol 631 ◽  
pp. A65 ◽  
Author(s):  
R. Cesaroni
Keyword(s):  
Flux Density ◽  
Cylindrical Symmetry ◽  
Numerical Code ◽  
Effect Of Temperature ◽  
Density Gradients ◽  
Density Structure ◽  
The Stability ◽  
Spherical And Cylindrical Symmetry ◽  
Account Temperature ◽  
Approximate Expressions

We consider a dusty clump in two cases of spherical and cylindrical symmetry to investigate the effect of temperature and density gradients on the observed flux density. Conversely, we evaluate how the presence of these gradients affects the calculation of the clump mass from the observed flux. We provide approximate expressions relating flux density and mass in the optically thick and thin limits and in the Rayleigh-Jeans regime, and we discuss the reliability of these expressions by comparing them to the outcome of a numerical code. Finally, we present the application of our calculations to three examples taken from the literature, which shows how the correction introduced after taking into account temperature and density gradients may affect our conclusions on the stability of the clumps.

Stability of Internal Modes in Circularly Cylindrical MDH Equilibria

1980 ◽  
Vol 35 (1) ◽  
pp. 75-79
Author(s):  
D. Lortz ◽  
J. Nührenberg
Keyword(s):  
Stability Analysis ◽  
Pressure Gradient ◽  
Plasma Boundary ◽  
Cylindrical Symmetry ◽  
Magnetic Axis ◽  
Marginal Stability ◽  
Stability Conditions ◽  
The Stability

Abstract The stability of internal modes, i.e. modes which leave the plasma boundary unperturbed, is discussed for magnetohydrostatic equilibria in circularly cylindrical symmetry. Stability analysis can be performed analytically by expansion near the magnetic axis. Marginal stability conditions relating the pressure gradient and the shear are determined.

On the stability of a domain-wall brane model

2011 ◽  
Vol 74 (15) ◽  
pp. 4989-4999 ◽  
Author(s):  
Jayne Thompson ◽  
Bevan Thompson ◽  
Michal Fečkan
Keyword(s):  
Domain Wall ◽  
Brane Model ◽  
The Stability

Dynamics of shearing viscous fluids in f(R,T) gravity

2017 ◽  
Vol 27 (01) ◽  
pp. 1750181 ◽  
Author(s):  
Hina Azmat ◽  
M. Zubair ◽  
Ifra Noureen
Keyword(s):  
Cylindrical Symmetry ◽  
Dynamical Analysis ◽  
Index Formula ◽  
Anisotropic Fluid ◽  
Perturbation Approach ◽  
Field Equations ◽  
Dynamical Equations ◽  
Cylindrical System ◽  
Pressure Anisotropy ◽  
The Stability

In this paper, we have analyzed the dynamical stability of shearing viscous anisotropic fluid with cylindrical symmetry in [Formula: see text] theory. We have chosen two viable [Formula: see text] models for dynamical analysis, and explored their nature and role for stable stellar configuration. Modified field equations and corresponding dynamical equations have been constructed, perturbation approach is adopted to deal with complexity of these equations. With the help of perturbed dynamical equations, the evolution equation has been established to analyze the role of shear viscosity and pressure anisotropy on dynamics of cylindrical system. The adiabatic index [Formula: see text] is used to investigate the instabilities appearing in Newtonian (N) and post-Newtonian (pN) approximations. Some conditions are found for material variables that are required to meet the stability criterion. We compare the outcomes of our analysis with the results of various models available in literature to reach at more comprehensive conclusion.

STUDY OF DOMAIN WALL MOTION OF ROUND MARKS IN AN EXCHANGE-COUPLED CoNi/Pt FILM

NANO ◽  
2009 ◽  
Vol 04 (01) ◽  
pp. 41-45
Author(s):  
LI ZHANG ◽  
JIE-GANG PENG ◽  
ZHI-YONG ZHONG ◽  
XIAO-TAO ZU
Keyword(s):  
Domain Wall ◽  
Magnetic Recording ◽  
Domain Wall Motion ◽  
Domain Size ◽  
Magnetic Domains ◽  
Perpendicular Media ◽  
Stable Domain ◽  
The Stability ◽  
Average Size ◽  
Dynamic Domain

We study the motion of domain wall in round marks formed in an exchange-coupled CoNi/Pt film, suitable for perpendicular magnetic recording. Marks were written by probe-based magnetic recording, with an average size of 180 nm. By applying external magnetic field on those marks, they begin to shrink. The minimum field required to move the domain wall of marks, i.e., domain wall coercivity, is 60% the nucleation coercivity of the medium. A model of dynamic domain motion was executed to study the stability of magnetic domains in exchange-coupled perpendicular media. It shows that the domain wall coercivity is a better fit than the nucleation coercivity to calculate the minimum stable domain size of the medium.

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