Domain wall pinning by point defects in ferroelectric materials

2007 ◽  
Author(s):  
D. Schrade ◽  
R. Mueller ◽  
B. X. Xu ◽  
D. Gross
Keyword(s):  
Domain Wall ◽  
Point Defects ◽  
Ferroelectric Materials ◽  
Domain Wall Pinning

Interaction between Domain Walls and Point Defects in Tetragonal BaTiO3

1986 ◽  
Vol 82 ◽  
Author(s):  
O. Boser ◽  
D. N. Beshers
Keyword(s):  
Dielectric Constant ◽  
Domain Wall ◽  
Point Defects ◽  
Elastic Constants ◽  
Domain Walls ◽  
Ferroelectric Materials ◽  
The Other ◽  
Interaction Forces ◽  
Elastic Dipole ◽  
Magnetic Case

ABSTRACTDopants in ferroelectric materials affect the dielectric constant and the shape of the hysteresis loop. To understand and quantify these effects it is necessary to calculate the interaction between dopant and domain wall. In the following the dopant ion is modelled as an elastic dipole. The stresses surrounding a 180° domain wall are calculated in analogy to calculations in the magnetic case for Bloch walls. It is assumed that electrostrictive effects control the strains and that the spontaneous polarization does not rotate but decreases to zero at the center of the domain wall and increases in the opposite direction on the other side of the domain wall. The calculations are made assumingisotropic elastic constants. It is found that only elastic dipoles oriented in the planeof the domain wall interact with it. The interaction forces as a function of perpendicular distance between wall and dipole show an antisymmetric characteristic.

Domain wall pinning on the point defects in ferromagnetic crystals

1984 ◽  
Vol 44 (1-2) ◽  
pp. 187-194 ◽  
Author(s):  
A.E. Borovik ◽  
S. Klama ◽  
S.I. Kulinich
Keyword(s):  
Domain Wall ◽  
Point Defects ◽  
Domain Wall Pinning

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,

Micromagnetic study of domain-wall pinning characteristics with grooves in thin films

2005 ◽  
Vol 97 (10) ◽  
pp. 10E317 ◽  
Author(s):  
H. Asada ◽  
H. Ii ◽  
J. Yamasaki ◽  
M. Takezawa ◽  
T. Koyanagi
Keyword(s):  
Thin Films ◽  
Domain Wall ◽  
Domain Wall Pinning

Domain-wall pinning in uniaxial phases of Pb adlayers on a Cu(110) surface

1990 ◽  
Vol 65 (24) ◽  
pp. 3025-3028 ◽  
Author(s):  
K. S. Liang ◽  
K. L. D’Amico ◽  
C. H. Lee ◽  
E. Y. Sheu
Keyword(s):  
Domain Wall ◽  
Domain Wall Pinning

scholarly journals Reduced domain wall pinning in ultrathin Pt/Co100−xBx/Pt with perpendicular magnetic anisotropy

2010 ◽  
Vol 96 (2) ◽  
pp. 022501 ◽  
Author(s):  
R. Lavrijsen ◽  
G. Malinowski ◽  
J. H. Franken ◽  
J. T. Kohlhepp ◽  
H. J. M. Swagten ◽  
...  
Keyword(s):  
Domain Wall ◽  
Magnetic Anisotropy ◽  
Perpendicular Magnetic Anisotropy ◽  
Domain Wall Pinning

scholarly journals Nanoscale modification of magnetic properties for effective domain wall pinning

2019 ◽  
Vol 475 ◽  
pp. 70-75 ◽  
Author(s):  
Tianli Jin ◽  
Funan Tan ◽  
Wai Cheung Law ◽  
Weiliang Gan ◽  
Ivan Soldatov ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Domain Wall ◽  
Domain Wall Pinning ◽  
Effective Domain

scholarly journals The study of domain-wall pinning by inhomogeneities in nanocrystalline permanent magnets

2003 ◽  
Vol 52 (3) ◽  
pp. 708
Author(s):  
Rong Chuan-Bing ◽  
Zhang Hong-Wei ◽  
Zhang Jian ◽  
Zhang Shao-Ying ◽  
Shen Bao-Gen
Keyword(s):  
Domain Wall ◽  
Permanent Magnets ◽  
Domain Wall Pinning
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