Stress dependence of the domain wall potential in amorphous CoFeSiB glass-coated microwires

2006 ◽  
Vol 372 (1-2) ◽  
pp. 230-233 ◽  
Author(s):  
R. Varga ◽  
A. Zhukov ◽  
J.M. Blanco ◽  
J. Gonzalez ◽  
V. Zhukova ◽  
...  
Keyword(s):  
Domain Wall ◽  
Stress Dependence ◽  
Wall Potential

scholarly journals Impact of Stress Annealing on the Magnetization Process of Amorphous and Nanocrystalline Co-Based Microwires

Materials ◽  
2019 ◽  
Vol 12 (16) ◽  
pp. 2644 ◽  
Author(s):  
Ahmed Talaat ◽  
Valentina Zhukova ◽  
Mihail Ipatov ◽  
Juan María Blanco ◽  
Julián Gonzalez ◽  
...  
Keyword(s):  
Domain Wall ◽  
Stress Dependence ◽  
Magnetization Process ◽  
Magnetoelastic Anisotropy ◽  
Tensile Stresses ◽  
Amorphous Microwires

The domain wall (DW) dynamics of amorphous and nanocrystalline Co-based glass-coated microwires are explored under the influence of stress annealing. Different annealing profiles have enabled remarkable changes in coercivity and magnetostriction values of Co-based amorphous microwires with initially negative magnitude, allowing induced magnetic bistability in stress-annealed samples and, consequently, high DW velocity has been observed. Similarly, Co-based nanocrystalline microwires with positive magnetostriction and spontaneous bistability have featured high DW velocity. Different values of tensile stresses applied during annealing have resulted in a redistribution of magnetoelastic anisotropy showing a decreasing trend in both DW velocities and coercivity of nanocrystalline samples. Observed results are discussed in terms of the stress dependence on magnetostriction and microstructural relaxation.

scholarly journals Stress dependence of the domain wall dynamics in the adiabatic regime

2011 ◽  
Vol 323 (3-4) ◽  
pp. 268-271 ◽  
Author(s):  
F. Beck ◽  
R.C. Gomes ◽  
K.D. Sossmeier ◽  
F. Bohn ◽  
M. Carara
Keyword(s):  
Domain Wall ◽  
Stress Dependence ◽  
Domain Wall Dynamics ◽  
Adiabatic Regime

The influence of glass coating on the single domain wall potential in amorphous glass-coated Fe-based microwires

2006 ◽  
Vol 304 (2) ◽  
pp. e519-e521 ◽  
Author(s):  
Rastislav Varga ◽  
Arcady Zhukov ◽  
Michail Ipatov ◽  
Juan Maria Blanco ◽  
Julian Gonzalez ◽  
...  
Keyword(s):  
Domain Wall ◽  
Single Domain ◽  
Glass Coating ◽  
Wall Potential ◽  
Amorphous Glass

Crossover in domain wall potential polarity as a function of anti-notch geometry

2011 ◽  
Vol 44 (23) ◽  
pp. 235002 ◽  
Author(s):  
M Chandra Sekhar ◽  
S Goolaup ◽  
I Purnama ◽  
W S Lew
Keyword(s):  
Domain Wall ◽  
Wall Potential ◽  
Notch Geometry

Electron Microscopy of Graphite Intercalation Compounds

1982 ◽  
Vol 40 ◽  
pp. 544-545
Author(s):  
G. Timp ◽  
L. Salamanca-Riba ◽  
L.W. Hobbs ◽  
G. Dresselhaus ◽  
M.S. Dresselhaus
Keyword(s):  
Electron Microscopy ◽  
Phase Transitions ◽  
Domain Wall ◽  
Intercalation Compounds ◽  
Lattice Plane ◽  
Wall Model ◽  
Graphite Intercalation Compounds ◽  
Fundamental Symmetry ◽  
Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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.

The need of electron microscopy in the study of domains and domain walls in ferroelectrics

1994 ◽  
Vol 52 ◽  
pp. 550-551
Author(s):  
Wenwu Cao
Keyword(s):  
Domain Wall ◽  
Domain Walls ◽  
High Mobility ◽  
Continuum Theory ◽  
Polarization Vector ◽  
Ferroelectric Materials ◽  
Dielectric Constants ◽  
Nonlocal Coupling ◽  
Cubic Symmetry ◽  
Gradient Energy

Domain structures play a key role in determining the physical properties of ferroelectric materials. The formation of these ferroelectric domains and domain walls are determined by the intrinsic nonlinearity and the nonlocal coupling of the polarization. Analogous to soliton excitations, domain walls can have high mobility when the domain wall energy is high. The domain wall can be describes by a continuum theory owning to the long range nature of the dipole-dipole interactions in ferroelectrics. The simplest form for the Landau energy is the so called ϕ model which can be used to describe a second order phase transition from a cubic prototype,where Pi (i =1, 2, 3) are the components of polarization vector, α's are the linear and nonlinear dielectric constants. In order to take into account the nonlocal coupling, a gradient energy should be included, for cubic symmetry the gradient energy is given by,

Some peculiarities of 180°-domain wall moticn in thin ferroelectric crystals

1983 ◽  
Vol 44 (10) ◽  
pp. 293-299 ◽  
Author(s):  
E. V. Burtsev ◽  
S. Y. Chervonobrodov
Keyword(s):  
Domain Wall ◽  
Ferroelectric Crystals

Numerical Analysis of a Magnetic Domain Wall in a Magnetic Nanocontact

2005 ◽  
Vol 29 (2) ◽  
pp. 116-119
Author(s):  
T. Komine ◽  
T. Takahashi ◽  
R. Sugita ◽  
T. Muranoi ◽  
Y. Hasegawa
Keyword(s):  
Numerical Analysis ◽  
Domain Wall ◽  
Magnetic Domain ◽  
Magnetic Domain Wall
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