Non-linear variation of domain period under electric field in demagnetized CoFeB/MgO stacks with perpendicular easy axis

2018 ◽  
Vol 112 (20) ◽  
pp. 202402 ◽  
Author(s):  
N. Ichikawa ◽  
T. Dohi ◽  
A. Okada ◽  
H. Sato ◽  
S. Fukami ◽  
...  
Keyword(s):  
Electric Field ◽  
Easy Axis ◽  
Linear Variation ◽  
Non Linear ◽  
Domain Period

scholarly journals Electric field strength on water based aluminum alloys nanofluids flow up a non-linear inclined sheet

2019 ◽  
Vol 22 (1) ◽  
pp. 229-236
Author(s):  
R. Kandasamy ◽  
Nur Atikah bt Adnan ◽  
Jaafar Abdul Abbas Abbood ◽  
Mohd Kamarulzaki ◽  
Mohd Saifullah
Keyword(s):  
Aluminum Alloys ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Water Based ◽  
Non Linear ◽  
Inclined Sheet

scholarly journals Detection of oscillatory solutions in a vacuum diode with total electron reflection

2021 ◽  
Vol 2103 (1) ◽  
pp. 012205
Author(s):  
V I Kuznetsov ◽  
IK Morozov
Keyword(s):  
Electron Beam ◽  
Electric Field ◽  
Vacuum Diode ◽  
Boundary Line ◽  
Electrode Gap ◽  
Oscillatory Solutions ◽  
Total Electron ◽  
Electron Reflection ◽  
Instability Development ◽  
Non Linear

Abstract Stability features of steady-state solutions for a vacuum diode with complete deceleration of electron beam is studied. A boundary line on the (inter-electrode gap, external voltage)-plane separating stable solutions from unstable ones is built up. An instability development is shown to end in a state with non-linear oscillations of the electric field but with no virtual cathode in a plasma. Existence of non-linear oscillations of the electric field in a vacuum diode with total reflection of an electron beam points out that such a diode can be a basis to create microwave generator.

Pixellated CdZnTe Detector Based Investigation for Non-Linear Variation of Screening Effect Caused by Accumulated Carriers

2015 ◽  
Vol 35 (s1) ◽  
pp. s104001
Author(s):  
黎淼 Li Miao ◽  
肖沙里 Xiao Shali ◽  
杨国强 Yang Guoqiang ◽  
马跃东 Ma Yuedong
Keyword(s):  
Linear Variation ◽  
Screening Effect ◽  
Cdznte Detector ◽  
Non Linear

THE FREQUENCY DEPENDENCE AND NON-LINEAR DIELECTRIC PROPERTY OF ER FLUID

1996 ◽  
Vol 10 (23n24) ◽  
pp. 3073-3080 ◽  
Author(s):  
KUNQUAN LU ◽  
WEIJIA WEN ◽  
CHENXI LI
Keyword(s):  
Dielectric Property ◽  
Field Strength ◽  
Electric Field ◽  
Frequency Dependence ◽  
Threshold Value ◽  
Shear Stresses ◽  
Linear Behavior ◽  
Non Linear ◽  
Er Fluids ◽  
Er Fluid

The frequency dependence of the shear stress in ac field and the non-linear dielectric property of ER fluid have been studied. We find that the shear stresses of some water-free ER fluids increase monotonously with the frequency and tend to reach saturated values at high frequency. The measurements on KNbO 3/silicone ER fluid show that the shear stresses under 103 Hz frequency a.c. field are several times or even an order larger than that under d.c. field for the same field strength. The studies of non-linear dielectric properties of ER fluids show that the permittivity of ER fluid increases linearly with increasing field strength when the electric field exceeds a threshold value E 1 and tends to a saturated constant beyond a high field strength E 2. Correspondingly the current density follows linear behavior no longer in the region between E 1 and E 2. A model based on the rearrangement of the particles under the electric field. which causes the variation of the dielectric property of the ER fluid, is proposed and the analysis is consistent with the measured results.

Surface-Induced Flexoelectric Domains in Asymmetrically Strong-Weak Anchored MBBA Films

1982 ◽  
Vol 37 (4) ◽  
pp. 334-341
Author(s):  
H. P. Hinov
Keyword(s):  
Liquid Crystal ◽  
Electric Field ◽  
Dielectric Anisotropy ◽  
Crystal Layer ◽  
Liquid Crystal Layer ◽  
Surface Anchoring ◽  
Threshold Voltages ◽  
Domain Period ◽  
Cell Thickness

Abstract The longitudinal surface-induced flexoelectric domains, previously obtained in symmetrically weak-anchored nematic layers have been further investigated in asymmetrically strong-weak anchored MBBA layers. The threshold voltages indicating the onset of the flexoelectric instabilities are high for thin cells (d = 9 μm, Uth = 10 V) and small for thick cells (d = 150 μm, Uth =1.5 V). Pronounced minima in the curves p vs. d and Uth vs. d, where p is the domain period and d is the cell thickness, were obtained. The flexoelectric domains were replaced by electrohydrodynamic instabilities only in the case of strong azimuthal anchoring of the liquid crystal layer.The role of the sign and the value of the dielectric anisotropy, the homogeneity of the electric field as well as the asymmetry in the surface anchoring are discussed in detail.

Effective response of a non-linear composite in external AC electric field

2002 ◽  
Vol 324 (1-4) ◽  
pp. 322-328 ◽  
Author(s):  
Wei En-bo ◽  
Song Jin-bao ◽  
Gu Guo-qing
Keyword(s):  
Electric Field ◽  
Effective Response ◽  
Ac Electric Field ◽  
Linear Composite ◽  
Non Linear
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