Acoustic-domain resonance mode in magnetic closure-domain structures: A probe for domain-shape characteristics and domain-wall transformations

2014 ◽  
Vol 89 (21) ◽  
Author(s):  
Claudia Hengst ◽  
Manfred Wolf ◽  
Rudolf Schäfer ◽  
Ludwig Schultz ◽  
Jeffrey McCord
Keyword(s):  
Domain Wall ◽  
Resonance Mode ◽  
Domain Shape ◽  
Domain Structures ◽  
Closure Domain ◽  
Shape Characteristics ◽  
Acoustic Domain

scholarly journals Domain shape instabilities and dendrite domain growth in uniaxial ferroelectrics

2018 ◽  
Vol 376 (2113) ◽  
pp. 20170204 ◽  
Author(s):  
Vladimir Ya. Shur ◽  
Andrey R. Akhmatkhanov
Keyword(s):  
Phase Transformation ◽  
Domain Wall ◽  
Domain Structure ◽  
Domain Growth ◽  
Structure Evolution ◽  
Theme Issue ◽  
First Order ◽  
Domain Shape ◽  
Domain Structures ◽  
First Order Phase

The effects of domain wall shape instabilities and the formation of nanodomains in front of moving walls obtained in various uniaxial ferroelectrics are discussed. Special attention is paid to the formation of self-assembled nanoscale and dendrite domain structures under highly non-equilibrium switching conditions. All obtained results are considered in the framework of the unified kinetic approach to domain structure evolution based on the analogy with first-order phase transformation. This article is part of the theme issue ‘From atomistic interfaces to dendritic patterns’.

scholarly journals Current-driven domain wall motion in artificial magnetic domain structures

2013 ◽  
Vol 62 (10) ◽  
pp. 1534-1538
Author(s):  
M. Hari ◽  
K. Wang ◽  
S. J. Bending ◽  
E. Arac ◽  
D. Atkinson ◽  
...  
Keyword(s):  
Domain Wall ◽  
Wall Motion ◽  
Magnetic Domain ◽  
Domain Wall Motion ◽  
Domain Structures

scholarly journals Angular Dependence of Domain Wall Resistivity in Artificial Magnetic Domain Structures

2006 ◽  
Vol 97 (20) ◽  
Author(s):  
A. Aziz ◽  
S. J. Bending ◽  
H. G. Roberts ◽  
S. Crampin ◽  
P. J. Heard ◽  
...  
Keyword(s):  
Domain Wall ◽  
Angular Dependence ◽  
Magnetic Domain ◽  
Domain Structures ◽  
Wall Resistivity

Observations of Interaction Between Magnetic Domain Wall and Grain Boundaries in Fe-3wt%Si Alloy by Kerr Microscopy

1999 ◽  
Vol 586 ◽  
Author(s):  
K. Kawahara ◽  
Y. Yagyu ◽  
S. Tsurekawa ◽  
T. Watanabe
Keyword(s):  
Domain Wall ◽  
Grain Boundary ◽  
Grain Boundaries ◽  
Domain Structure ◽  
Misorientation Angle ◽  
Magnetic Domain ◽  
Magnetic Domain Structure ◽  
Magnetic Domain Wall ◽  
Domain Structures ◽  
Grain Boundary Plane

ABSTRACTMagnetic domain structures in Fe-3wt%Si alloy have been observed by a Kerr microscopy to understand the interaction between the magnetic domain wall and grain boundaries. It was found that the domain structures in the vicinity of the grain boundary depend on the misorientation angle; the high angle random boundary disturbs the magnetic domain structure more than the low angle boundary. In addition to the misorientation angle, magnetic domain structures were affected by the inclination of the grain boundary plane. Moreover, dynamic observations of rearrangement of the magnetic domain structure during magnetization revealed that grain boundaries could act as the sink and/or the source for magnetic domains.

scholarly journals Walker-like domain wall breakdown in layered antiferromagnets driven by staggered spin–orbit fields

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Rubén M. Otxoa ◽  
P. E. Roy ◽  
R. Rama-Eiroa ◽  
J. Godinho ◽  
K. Y. Guslienko ◽  
...  
Keyword(s):  
Domain Wall ◽  
Large Scale ◽  
Domain Walls ◽  
Spin Dynamics ◽  
Continuum Theory ◽  
Dynamical Regime ◽  
Spin Orbit ◽  
Translational Invariance ◽  
Domain Structures ◽  
Dynamics Simulations

Abstract Within linear continuum theory, no magnetic texture can propagate faster than the maximum group velocity of the spin waves. Here, by atomistic spin dynamics simulations and supported by analytical theory, we report that a strongly non-linear transient regime due to the appearance of additional magnetic textures results in the breaking of the Lorentz translational invariance. This dynamical regime is akin to domain wall Walker-breakdown in ferromagnets and involves the nucleation of an antiferromagnetic domain wall pair. While one of the nucleated domain walls is accelerated beyond the magnonic limit, the remaining pair remains static. Under large spin–orbit fields, a cascade of multiple generation and recombination of domain walls are obtained. This result may clarify recent experiments on current pulse induced shattering of large domain structures into small fragmented domains and the subsequent slow recreation of large-scale domains.

Micromagnetic Simulation on Ground State Domain Structures of Barium Hexaferrite (BaFe12O19)

2014 ◽  
Vol 896 ◽  
pp. 414-417 ◽  
Author(s):  
Dede Djuhana ◽  
Dita C.C. Oktri ◽  
D.H. Kim
Keyword(s):  
Domain Wall ◽  
Ground State ◽  
Full Width Half Maximum ◽  
Barium Hexaferrite ◽  
Micromagnetic Simulation ◽  
Bloch Wall ◽  
Full Width ◽  
Wall Width ◽  
Domain Structures ◽  
Domain Wall Width

We have systematically investigated the domain structures of Barium Hexaferrite (BaFe12O19) by means of a micromagnetic simulation under zero external magnetic field. A hexagonal-shaped and cylindrical-shaped models are used in this simulation with respect to the diameter variation from 50 nm to 600 nm. A transition domain structure is found from a single-domain (SD) to multi-domain (MD) at a certain diameter. The hexagonal-shaped occurs in diameter 430 nm and cylindrical-shaped in diameter 410 nm. Interestingly, the domain wall of MD structure exhibits a Bloch-wall type. The domain wall width is determined by full width half maximum (FWHM) method from the transverse magnetization component data. The domain wall width from simulation showed close to Kittel’s formula

scholarly journals Interconversion of multiferroic domains and domain walls

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
E. Hassanpour ◽  
M. C. Weber ◽  
Y. Zemp ◽  
L. Kuerten ◽  
A. Bortis ◽  
...  
Keyword(s):  
Domain Wall ◽  
Physical Properties ◽  
Domain Walls ◽  
Three Dimensional ◽  
Topological Defects ◽  
Long Range Order ◽  
Two Dimensional ◽  
Domain Structures ◽  
Topological Singularities ◽  
Ordered State

AbstractSystems with long-range order like ferromagnetism or ferroelectricity exhibit uniform, yet differently oriented three-dimensional regions called domains that are separated by two-dimensional topological defects termed domain walls. A change of the ordered state across a domain wall can lead to local non-bulk physical properties such as enhanced conductance or the promotion of unusual phases. Although highly desirable, controlled transfer of these properties between the bulk and the spatially confined walls is usually not possible. Here, we demonstrate this crossover by confining multiferroic Dy0.7Tb0.3FeO3 domains into multiferroic domain walls at an identified location within a non-multiferroic environment. This process is fully reversible; an applied magnetic or electric field controls the transformation. Aside from expanding the concept of multiferroic order, such interconversion can be key to addressing antiferromagnetic domain structures and topological singularities.

scholarly journals Study of Magnetization Reversal Process in FeCo/Ru/FeCo Exchange Coupled Synthetic Antiferromagnetic Multilayers

2015 ◽  
Vol 2015 ◽  
pp. 1-5 ◽  
Author(s):  
Xi Liu ◽  
Shunji Ishio ◽  
Hailin Ma
Keyword(s):  
Domain Wall ◽  
Domain Structure ◽  
Magnetization Reversal ◽  
Applied Field ◽  
Film Growth ◽  
Layer By Layer ◽  
Domain Structures ◽  
Reversal Process ◽  
The One ◽  
Magnetization Reversal Process

FeCo/Ru/FeCo exchange coupled synthetic antiferromagnetic multilayers were prepared with two sputtering modes. One is continuous sputtering mode, and the other mode is layer-by-layer sputtering mode. The former mode implies that substrate faced the target and film growth process was continuous when FeCo layers were sputtering, whereas the latter implies that substrate was rotating with the mask at a speed of 5 rpm when FeCo layers were sputtering. It was found that the exchange coupling fieldHexof sample sputtered by layer-by-layer mode was higher than the one sputtered by continuous mode. Domain structures were measured with applying varied in-plane magnetic fields along the easy axis in order to study the magnetization reversal process. We found it is a domain wall move process. When the applied field is smaller thanHex, both the two magnetic layers have domain structure and the domain structure of the two layers is reversed correspondingly. When the applied field is varying in the range of-HextoHex, the domain wall of the two layers moves correspondingly at the same time.

scholarly journals Domain wall orientation and domain shape in KTiOPO4 crystals

2016 ◽  
Vol 109 (13) ◽  
pp. 132901 ◽  
Author(s):  
V. Ya. Shur ◽  
E. M. Vaskina ◽  
E. V. Pelegova ◽  
M. A. Chuvakova ◽  
A. R. Akhmatkhanov ◽  
...  
Keyword(s):  
Domain Wall ◽  
Domain Shape
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