Interfacial polarisation effect on the interlayer couplings in Co/Rh sandwiches

1998 ◽  
Vol 5 (2) ◽  
pp. 203-214 ◽  
Author(s):  
A. Dinia ◽  
S. Zoll ◽  
M. Gester ◽  
D. Stoeffler ◽  
J.P. Jay ◽  
...  
Keyword(s):  
Interfacial Polarisation ◽  
Polarisation Effect

scholarly journals An Impedance Study of the Membrane Polarisation Effect in Simulated Rock Systems

2021 ◽  
Author(s):  
◽  
Michael Charles Harold McKubre
Keyword(s):  
Low Frequency ◽  
Impedance Measurement ◽  
Impedance Analysis ◽  
Laboratory Model ◽  
Pore Geometry ◽  
Impedance Spectra ◽  
Clay Rock ◽  
Polarisation Effect ◽  
Diffusional Limitation ◽  
Electrochemical Model

<p>Work is reported on the development of a high precision, low frequency impedance bridge, and the use of impedance measurement in characterising the induced polarisation effect of unmineralised material. Impedance spectra for a variety of laboratory model clay/rock/electrolyte systems are analysed in terms of an equivalent circuit. By measuring the dependence of the parameters of this circuit, on such variables as electrolyte type and concentration, temperature and pore geometry, an electrochemical model for membrane polarisation has been developed. Polarisation is considered to arise from diffusional limitation of cations at the membrane/electrolyte interface of clay aggregations in rock pores, and this is found to be amenable to a Warburg diffusional impedance analysis.</p>

1.3-Dithienium-and 1.3-Dithiolenium Salts, VI ,13C NMR Spectroscopic Investigations on 2-Substituted 1,3-Dithian-2-ylium Cations. Unusual γ-Effects

1997 ◽  
Vol 52 (6) ◽  
pp. 757-761 ◽  
Author(s):  
Hans-Otto Kalinowski ◽  
Ingfried Stahl
Keyword(s):  
Electric Field ◽  
Density Distribution ◽  
13C Nmr ◽  
Field Effect ◽  
Electron Density Distribution ◽  
Chemical Shifts ◽  
Membered Ring ◽  
Electric Field Effect ◽  
Polarisation Effect ◽  
C Nmr

Abstract The 13C NMR chemical shifts of 19 2-substituted 1,3-dithian-2-ylium-tetrafluorborates 1a-1s are discussed in comparison to known analogous 1,3-dithianes and 2-lithio-1,3-dithianes. The unusual γ-effects (up to 9 ppm), which can also observed in other six-membered ring systems, are explained by the electric field effect (σ-polarisation effect). The electron density distribution can be estimated qualitatively by comparison with the 1,3-dioxan-2-ylium-and cyclohexylcations.

scholarly journals Studies of iridescent colour, and the structure producing it. III.—The colours of labrador felspar

1923 ◽  
Vol 103 (720) ◽  
pp. 34-45 ◽  
Keyword(s):  
Point Of View ◽  
Polished Surface ◽  
Magnetic Oxide ◽  
Golden Yellow ◽  
Total Reflexion ◽  
Polarisation Effect ◽  
The Subject

The brilliant colours displayed by reflexion at certain angles from a polished surface of labradorite, or Labrador felspar, have long been known, and specimens of the material are to be seen in most mineral collections. Several investigations of the origin of these colours have been published, but I must confess that I have not been able to get clear ideas by studying them. The writers approach the subject primarilly from the mineralogist's point of view, and much mineralogical detail is introduced which seems doubtfully relevant and (to me at least) difficult to follow. Vogelsang's conclusion (translated) is: "The results of my investigations, so far as they concern the various colourations of labradorite, may be summarised as follows: A blue reflexion, due to a polarisation effect, is peculiar to a certain crystalline condition of the mineral. A golden yellow results from total reflexion on the included microlites, which consist of magnetic oxide of iron or of diallage as well; the association of these extraneous colouring matters and of the bluish reflexion on the cleavages accounts for the green or violet chatoyance; . . ."

Polarisation effect in the X-ray reflection of hexagonal BN crystal

2005 ◽  
Vol 144-147 ◽  
pp. 937-939 ◽  
Author(s):  
E.O. Filatova ◽  
E.Yu. Taracheva ◽  
J.-M. André ◽  
H.-Ch. Mertins ◽  
D. Abramsohn
Keyword(s):  
X Ray ◽  
Polarisation Effect

scholarly journals The polarisation of electrons by double scattering

1932 ◽  
Vol 135 (827) ◽  
pp. 429-458 ◽  
Keyword(s):  
Multiple Scattering ◽  
Positive Constant ◽  
Relativistic Theory ◽  
Double Scattering ◽  
Nuclear Scattering ◽  
Thin Foils ◽  
Polarisation Effect

1. In a previous paper the author has applied the relativistic theory of the electron due to Dirac to the problem of the scattering of electrons by atoms. The main purpose of the investigation was to discover whether any polarisation effect was to be expected when a beam of electrons was scattered by two successive targets. The experiment considered is illustrated in fig. 1. A beam of electrons LT 1 is scattered by a target T 1 , and those that are scattered through a certain angle θ 1 , are allowed to fall on a second target T 2 . It was shown that the number of electrons scattered by this second target in any direction T 2 M making an angle θ 2 with T 1 T 2 depends on the angle Ф that the plane T 1 T 2 M makes with the plane LT 1 T 2 . Ф is taken to be zero when the electron follows the coplanar path LT 1 T 2 M. The number scattered along T 2 M is proportional to 1 + δ cos Φ , where δ is a positive constant depending on θ 1 , θ 2 . Thus more electrons are scattered along T 2 M than T 2 M' in the figure, the numbers being in the ratio 1 + δ :1 — δ. It should be noted that the theory deals with single nuclear scattering, and is therefore only applicable if the scattering targets are thin foils, sufficiently thin for multiple scattering to be negligible. In the paper quoted it was found that δ is extremely small unless the following conditions are satisfied.

scholarly journals Polarisation changes in guided infrared thermography using silver halide poly-crystalline mid-infrared fibre bundle

2020 ◽  
Vol 142 (2) ◽  
pp. 1115-1122
Author(s):  
Sarah K. Markham ◽  
Aladin Mani ◽  
Elena A. Korsakova ◽  
Aleksandr S. Korsakov ◽  
Liya V. Zhukova ◽  
...  
Keyword(s):  
Fibre Bundle ◽  
Silver Halide ◽  
Thermal Camera ◽  
Core Diameter ◽  
Mid Infrared ◽  
Highly Sensitive ◽  
Thermal Measurements ◽  
Polarisation Effect ◽  
Set Up

Abstract Broadband mid-infrared (B-MIR) thermography using fibre optic waveguides can be critical in real-time imaging in harsh environments such as additive manufacturing, personalised medical diagnosis and therapy. We investigate the polarisation effect on thermal measurements through poly-crystalline fibre bundle employing a simple broadband cross-polarisation configuration experimental set-up. Silver halide poly-crystalline fibres AgCl1−xBrx (0 ≤ x≤1) (AgClBr-PolyC) have very wide transmission bandwidth spanning over the spectral range from 1 µm up to 31 µm FWHM. Moreover, they are non-toxic, non-hygroscopic, with relatively good flexibility, which make them very adequate for spectroscopic and thermal measurements in medical and clinical fields. In this study, we used a fibre bundle composed of seven single AgClBr-PolyC fibres, each with a core diameter of about 300 µm, inserted between two broadband MIR polarisers. A silicon carbide filament source was placed at the entrance of the fibre bundle, while a FLIR thermal camera with a close-up lens was employed to measure the spatial temperature distribution over the fibre-bundle end. Indeed, polarisation dependence of temperature measurements has been clearly observed in which the orientation of temperature extrema (minima and maxima) vary from one fibre to another within the bundle. Moreover, these observations have enabled the classification of AgClBr-PolyC fibres following their polarisation sensitivities by which some fibres are relatively highly sensitive to polarisation with polarisation temperature difference (PTD) that can reach 22.1 ± 2.8 °C, whereas some others show very low PTD values down to 3.1 ± 2.8 °C. Many applications can readily be found based on the advantages of both extreme cases.

Erratum: Interfacial polarisation in Al-Y2O3-SiO2-Si capacitor

1993 ◽  
Vol 29 (24) ◽  
pp. 2155
Author(s):  
C.-H. Ling
Keyword(s):  
Interfacial Polarisation

Complex resistivity of mineral rocks in the context of the generalised effective-medium theory of the induced polarisation effect

2018 ◽  
Vol 66 (4) ◽  
pp. 798-817 ◽  
Author(s):  
Michael S. Zhdanov ◽  
Vlad Burtman ◽  
Masashi Endo ◽  
Wei Lin
Keyword(s):  
Effective Medium Theory ◽  
Effective Medium ◽  
Medium Theory ◽  
Complex Resistivity ◽  
Induced Polarisation ◽  
Polarisation Effect
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