Electrical Analog of the Eddy‐Current‐Limited Domain‐Boundary Motion in Ferromagnetics

1955 ◽  
Vol 26 (11) ◽  
pp. 1297-1301 ◽  
Author(s):  
G. Brouwer
Keyword(s):  
Eddy Current ◽  
Domain Boundary ◽  
Boundary Motion ◽  
Electrical Analog

scholarly journals Phase domain boundary motion and memristance in gradient-doped FeRh nanopillars induced by spin injection

2021 ◽  
Vol 118 (12) ◽  
pp. 122403
Author(s):  
Rowan C. Temple ◽  
Mark C. Rosamond ◽  
Jamie R. Massey ◽  
Trevor P. Almeida ◽  
Edmund H. Linfield ◽  
...  
Keyword(s):  
Domain Boundary ◽  
Spin Injection ◽  
Boundary Motion ◽  
Phase Domain

Statics and Dynamics of “Charged” Interfaces in Electroceramics

1998 ◽  
Vol 4 (S2) ◽  
pp. 552-553
Author(s):  
Xiwei Lin ◽  
Conal Murray ◽  
Vinayak P. Dravid
Keyword(s):  
Electrical Activity ◽  
Opposite Sign ◽  
Domain Boundary ◽  
Schottky Barriers ◽  
Ferroelectric Thin Films ◽  
Length Scale ◽  
Boundary Motion ◽  
Direct Observations ◽  
Domain Configuration ◽  
Statics And Dynamics

A large number of electroceramics derive their technologically useful and scientifically appealing properties via electrically active (charged) interfaces.[l] These interfaces can be simple grain boundaries in, for example, varistors, to complicated domain configuration in ferroelectric thin films. Several common issues relate to virtually all electrically active interfaces. The electrical activity of such interfaces is usually a consequence of trapping of charged electronic and/or ionic defects. Such trapping leads to compensating charge of opposite sign across the interfaces, viz. space-charge region. Collectively, they influence and often dominate a wide variety of phenomena, ranging from formation of Schottky barriers to impedence to domain boundary motion.While bulk measurements, either electrical (e.g. P-E, C-V, I-V), optical (e.g. Raman) or resonance (e.g. EPR) have contributed significantly to the understanding of charged interfaces, there are very few direct observations of electrical activity of interfaces at a length-scale which is essential (i.e. 1- 10 nm).

scholarly journals Thermal Drag of the Antiphase Domain Boundary Motion

1997 ◽  
Vol 481 ◽  
Author(s):  
A. Umantsev
Keyword(s):  
Internal Energy ◽  
Linear Response ◽  
Energy Transport ◽  
Domain Boundary ◽  
Antiphase Domain ◽  
Experimental Setup ◽  
Boundary Motion ◽  
Drag Effect ◽  
Energy Excess ◽  
Onsager Theory

ABSTRACTAntiphase domain boundary is a region in materials where ordering of atoms changes from one structural variant to another. Influence of the internal energy excess on the dynamics of such boundary is considered in the framework of the Onsager theory of linear response. The internal energy transport entails a temperature hump in the transition region and causes a drag effect. An evolution equation that takes into account the finite thermal conductivity is derived. Experimental setup to reveal the thermal drag is suggested.

TEM study of lanthanum aluminate

1990 ◽  
Vol 48 (4) ◽  
pp. 1060-1061
Author(s):  
C.Y. Yang ◽  
Z.R. Huang ◽  
Y.Q. Zhou ◽  
C.Z. Li ◽  
W.H. Yang ◽  
...  
Keyword(s):  
Domain Boundary ◽  
Point Group ◽  
Optical Microscope ◽  
Dark Field ◽  
Zone Axis ◽  
Superconducting Film ◽  
Ion Milling ◽  
Lanthanum Aluminate ◽  
Ring Diameter ◽  
Diffraction Patterns

Lanthanum aluminate(LaAlO3) single crystal as a substrate for high Tc superconducting film has attracted attention recently. We report here a transmission electron microscopy(TEM) study of the crystal structure and phase transformation of LaAlO3 by using Philips EM420 and EM430 microscopes. Single crystals of LaAlO3 were investigated first by optical microscope. Stripe-shaped domains of mm size are clearly seen(Fig.1a), and 90° domain boundary is also obvious. TEM specimens were prepared by mechanical grinding and polishing followed by ion-milling.Fig.lb shows μm size stripe domains of LaAlO3. Convergent beam electron diffraction patterns (CBED) from single domain were taken.Fig. 2a and Fig. 2c are [001] zone axis patterns which show a 4mm symmetry, and the (200) dark field of this zone axis gives 2mm symmetry(fig.2b). Therefore the point group of this crystal is either 4/mmm or m3m. The projection of the first order Laue zone(FOLZ) reflections on zero layer (fig. 2c) shows that the unit cell is face centered. A tetragonal unit ceil is chosen, with a=0.532nm and c=0.753nm, c being determined from the FOLZ ring diameter.

Exact First Order Finite Element Modeling for Eddy Current NDE

1991 ◽  
Vol 3 (1) ◽  
pp. 235-253 ◽  
Author(s):  
L. D. Philipp ◽  
Q. H. Nguyen ◽  
D. D. Derkacht ◽  
D. J. Lynch ◽  
A. Mahmood
Keyword(s):  
Finite Element ◽  
Finite Element Modeling ◽  
Eddy Current ◽  
Element Modeling ◽  
First Order ◽  
Eddy Current Nde

MESSINE, a Parametric Three-Dimensional Eddy Current Model

2000 ◽  
Vol 12 (1) ◽  
pp. 65-86 ◽  
Author(s):  
R. La ◽  
B. Benoist ◽  
B. de Barmon ◽  
M. Talvard ◽  
R. Lengelle ◽  
...  
Keyword(s):  
Eddy Current ◽  
Current Model ◽  
Three Dimensional
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