scholarly journals Bifurcation of Symmetric Domain Walls for the Bénard–Rayleigh Convection Problem

2020 ◽  
Author(s):  
Mariana Haragus ◽  
Gérard Iooss
Keyword(s):  
Domain Walls ◽  
Symmetric Domain ◽  
Rayleigh Convection ◽  
Convection Problem

Axially symmetric domain walls confined in ferromagnetic nanotubes

2015 ◽  
Vol 2 (12) ◽  
pp. 126103 ◽  
Author(s):  
A P Chen ◽  
J Gonzalez ◽  
K Y Guslienko
Keyword(s):  
Domain Walls ◽  
Symmetric Domain ◽  
Axially Symmetric ◽  
Ferromagnetic Nanotubes

On Plane Symmetric Domain Walls and Cosmic Strings in Bimetric Theory

2006 ◽  
Vol 301 (1-4) ◽  
pp. 149-151 ◽  
Author(s):  
D. R. K. Reddy ◽  
K. S. Adhao ◽  
S. D. Katore
Keyword(s):  
Domain Walls ◽  
Cosmic Strings ◽  
Symmetric Domain ◽  
Bimetric Theory ◽  
Plane Symmetric

Approximation of Symmetry Breaking Bifurcations for the Rayleigh Convection Problem

1983 ◽  
Vol 20 (5) ◽  
pp. 873-884 ◽  
Author(s):  
Claudio Canuto ◽  
Hiroshi Fujii ◽  
Alfio Quarteroni
Keyword(s):  
Symmetry Breaking ◽  
Rayleigh Convection ◽  
Convection Problem

scholarly journals DOMAIN WALLS IN AdS-EINSTEIN-SCALAR GRAVITY

2011 ◽  
Vol 26 (12) ◽  
pp. 2075-2085
Author(s):  
SANGHEON YUN
Keyword(s):  
Field Theory ◽  
Domain Wall ◽  
Dimensional Reduction ◽  
Domain Walls ◽  
Symmetric Domain ◽  
Einstein Gravity ◽  
Supergravity Theory ◽  
Small Fluctuation ◽  
Domain Wall Solution ◽  
Scalar Gravity

In this paper, we show that the supergravity theory which is dual to ABJM field theory can be consistently reduced to scalar-coupled AdS-Einstein gravity and then consider the reflection symmetric domain wall and its small fluctuation. It is also shown that this domain wall solution is none other than dimensional reduction of M2-brane configuration.

The direct determination of magnetic domain wall profiles using a split detector STEM

1978 ◽  
Vol 36 (1) ◽  
pp. 466-467
Author(s):  
J.N. Chapman ◽  
P.E. Batson ◽  
E.M. Waddell ◽  
R.P. Ferrier
Keyword(s):  
Electron Microscope ◽  
Domain Wall ◽  
Transmission Electron Microscope ◽  
Domain Walls ◽  
Photographic Plate ◽  
Magnetic Domain ◽  
Direct Determination ◽  
Quantitative Information ◽  
Scanning Transmission Electron Microscope ◽  
Transmission Electron

By far the most commonly used mode of Lorentz microscopy in the examination of ferromagnetic thin films is the Fresnel or defocus mode. Use of this mode in the conventional transmission electron microscope (CTEM) is straightforward and immediately reveals the existence of all domain walls present. However, if such quantitative information as the domain wall profile is required, the technique suffers from several disadvantages. These include the inability to directly observe fine image detail on the viewing screen because of the stringent illumination coherence requirements, the difficulty of accurately translating part of a photographic plate into quantitative electron intensity data, and, perhaps most severe, the difficulty of interpreting this data. One solution to the first-named problem is to use a CTEM equipped with a field emission gun (FEG) (Inoue, Harada and Yamamoto 1977) whilst a second is to use the equivalent mode of image formation in a scanning transmission electron microscope (STEM) (Chapman, Batson, Waddell, Ferrier and Craven 1977), a technique which largely overcomes the second-named problem as well.

Lorentz microscopy study of magnetic domain walls in Fe-Cr-Co alloys

1978 ◽  
Vol 36 (1) ◽  
pp. 462-463
Author(s):  
Yalcin Belli
Keyword(s):  
Domain Walls ◽  
Magnetic Domain ◽  
Microscopy Study ◽  
Ferromagnetic Phase ◽  
Stable Phase ◽  
Magnetic Domains ◽  
Lorentz Microscopy ◽  
Magnetic Hardening ◽  
Electron Microscopes ◽  
Co Alloys

Fe-Cr-Co alloys have great technological potential to replace Alnico alloys as hard magnets. The relationship between the microstructures and the magnetic properties has been recently established for some of these alloys. The magnetic hardening has been attributed to the decomposition of the high temperature stable phase (α) into an elongated Fe-rich ferromagnetic phase (α1) and a weakly magnetic or non-magnetic Cr-rich phase (α2). The relationships between magnetic domains and domain walls and these different phases are yet to be understood. The TEM has been used to ascertain the mechanism of magnetic hardening for the first time in these alloys. The present paper describes the magnetic domain structure and the magnetization reversal processes in some of these multiphase materials. Microstructures to change properties resulting from, (i) isothermal aging, (ii) thermomagnetic treatment (TMT) and (iii) TMT + stepaging have been chosen for this investigation. The Jem-7A and Philips EM-301 transmission electron microscopes operating at 100 kV have been used for the Lorentz microscopy study of the magnetic domains and their interactions with the finely dispersed precipitate phases.

Temperature Dependence of Magnetic Domains and Wall Structures

1972 ◽  
Vol 30 ◽  
pp. 496-497
Author(s):  
Sonoko Tsukahara ◽  
Tadami Taoka ◽  
Hisao Nishizawa
Keyword(s):  
Temperature Dependence ◽  
Domain Walls ◽  
Magnetic Domain ◽  
Iron Film ◽  
Objective Lens ◽  
Lorentz Microscopy ◽  
Domain Structures ◽  
Wall Structures ◽  
Crystal Films ◽  
Metallurgical Structure

The high voltage Lorentz microscopy was successfully used to observe changes with temperature; of domain structures and metallurgical structures in an iron film set on the hot stage combined with a goniometer. The microscope used was the JEM-1000 EM which was operated with the objective lens current cut off to eliminate the magnetic field in the specimen position. Single crystal films with an (001) plane were prepared by the epitaxial growth of evaporated iron on a cleaved (001) plane of a rocksalt substrate. They had a uniform thickness from 1000 to 7000 Å.The figure shows the temperature dependence of magnetic domain structure with its corresponding deflection pattern and metallurgical structure observed in a 4500 Å iron film. In general, with increase of temperature, the straight domain walls decrease in their width (at 400°C), curve in an iregular shape (600°C) and then vanish (790°C). The ripple structures with cross-tie walls are observed below the Curie temperature.

Sign in / Sign up

Export Citation Format

Share Document