scholarly journals On the Equivalence of Current Loops and Magnetic Shells

1961 ◽  
Vol 14 (1) ◽  
pp. 188
Author(s):  
CA Hurst
Keyword(s):  
Magnetic Field ◽  
Magnetic Effects

A paradox in the theory of the magnetic effects of stationary currents is discussed and is shown to arise from the neglect of a singular magnetic field which is required to complete the equivalence of magnetic shells and current loops.

scholarly journals The role of electric field, peripheral chains, and magnetic effects on significant 1H upfield shifts of the encapsulated molecules in chalcogen-bonded capsules

2021 ◽  
Vol 23 (35) ◽  
pp. 19647-19658
Author(s):  
Demeter Tzeli ◽  
Ioannis D. Petsalakis ◽  
Giannoula Theodorakopoulos ◽  
Faiz-Ur Rahman ◽  
Yang Yu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Chemical Shifts ◽  
Electric Field Effects ◽  
Magnetic Effects ◽  
Field Effects ◽  
Equal Importance

Significant 1H upfield chemical shifts of the guests in the capsules are consequences of polarizability of chalcogens, electric field effects and peripheral chains. The effects of the electric field and of magnetic field are of equal importance.

Design of a magnetic field generator for experiments on magnetic effects in cell cultures

1984 ◽  
Vol 5 (4) ◽  
pp. 399-410 ◽  
Author(s):  
Y. Kinouchi ◽  
T. Ushita ◽  
K. Sato ◽  
H. Miyamoto ◽  
H. Yamaguchi ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Cell Cultures ◽  
Magnetic Effects ◽  
Magnetic Field Generator

LIMITING VALUES OF GRAVITATIONAL AND MAGNETIC ANOMALIES DUE TO A SUBTERRANEAN STRUCTURE BOUNDED BY A SINGLE DIFFERENTIAL SURFACE

Geophysics ◽  
1941 ◽  
Vol 6 (1) ◽  
pp. 1-12 ◽  
Author(s):  
J. W. Fisher
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Magnetic Anomalies ◽  
Effective Thickness ◽  
Earth’S Magnetic Field ◽  
Magnetic Effects ◽  
Earth's Magnetic Field ◽  
Survey Results ◽  
Limiting Values

Calculations are made of gravitational and magnetic anomalies supposed due to local variations in the form of a single differential surface separating an overlying rock from an underlying one, the effective thickness of the latter being infinite. Both layers are homogeneous in density or magnetic susceptibility and only those magnetic effects are considered which are due to induction in the earth’s magnetic field. The maximum possible values of these anomalies and of their first and second horizontal derivatives are calculated under these simplified conditions, and it is pointed out that the numerical readings of these quantities, provided by survey results, may lead to useful estimates of the extreme depth and proportions of the structure responsible.

scholarly journals Magnetic effects on solar p-modes

1988 ◽  
Vol 123 ◽  
pp. 161-165
Author(s):  
W R Campbell ◽  
B Roberts
Keyword(s):  
Magnetic Field ◽  
Field Strength ◽  
Magnetic Field Strength ◽  
Lower Limit ◽  
Convection Zone ◽  
Magnetic Effects ◽  
Numerical Studies ◽  
Low Degree ◽  
The Magnetic Field

Both analytical and numerical studies of the effect of a magnetic field at the base of the convection zone on p-modes are presented. It is argued that the recently reported changes in the low degree p-mode frequencies, from 1980 to 1984, may result from corresponding changes in the magnetic field strength. A lower limit of some 5 × 105–106 gauss is implied for the field strength at the base of the convection zone.

EBSD study of the morphology and orientation of the primary and eutectic phases in Al–Cu alloys during solidification under a strong magnetic field

2016 ◽  
Vol 49 (1) ◽  
pp. 139-148 ◽  
Author(s):  
Xi Li ◽  
Yves Fautrelle ◽  
Rene Moreau ◽  
Zhongming Ren
Keyword(s):  
Magnetic Field ◽  
Directional Solidification ◽  
Strong Magnetic Field ◽  
Electron Backscatter Diffraction ◽  
Axial Magnetic Field ◽  
Crystal Direction ◽  
Magnetic Effects ◽  
Cu Alloys ◽  
Backscatter Diffraction ◽  
The Magnetic Field

The effect of a strong magnetic field on the morphology and orientation of the Al2Cu dendrite and Al–Al2Cu eutectic in Al–Cu alloys was studied using electron backscatter diffraction (EBSD) technology. The experimental results revealed that the applied magnetic field modified the morphology and orientation of both the Al2Cu dendrite and the Al–Al2Cu eutectic significantly. The magnetic field caused a break in the Al2Cu dendrite and the degeneration of Al–Al2Cu eutectic lamellae during directional solidification. It was also found that the magnetic field caused the formation of dislocations in the α-Al and Al2Cu phases during directional solidification. In addition, the primary and eutectic Al2Cu phases were oriented with the 〈001〉 crystal direction along the magnetic field during volume solidification. Both α-Al and Al2Cu phases were oriented with the 〈001〉 crystal direction along the solidification direction during directional solidification under an axial magnetic field. The above phenomena were enhanced as the magnetic field increased; this could be attributed to magnetic crystalline anisotropy of the material and thermoelectric magnetic effects. This study may offer experimental evidence that shows that thermoelectric magnetic effects significantly influence dendrite arrays during directional solidification in a magnetic field.

scholarly journals Pulsation of Rotating and Magnetic Stars

1993 ◽  
Vol 137 ◽  
pp. 497-511 ◽  
Author(s):  
Sergei V. Vorontsov
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Spherical Symmetry ◽  
Slow Rotation ◽  
Theoretical Studies ◽  
Pulsating Stars ◽  
Magnetic Effects ◽  
Weak Magnetic Fields ◽  
Magnetic Stars ◽  
Oscillation Frequencies

AbstractRotation and a magnetic field break the spherical symmetry of a star viewed as a pulsating system, lifting the degeneracy of oscillation frequencies, and leading to (sometimes prominent) observational consequences. Theoretical studies of rotational and magnetic effects in pulsating stars are reviewed, starting with simple configurations with slow rotation and weak magnetic fields.

scholarly journals Exploring the Effects of Active Magnetic Drag in a Gener\al Circulation Model of the Ultrahot Jupiter WASP-76b

2021 ◽  
Vol 163 (1) ◽  
pp. 35
Author(s):  
Hayley Beltz ◽  
Emily Rauscher ◽  
Michael T. Roman ◽  
Abigail Guilliat
Keyword(s):  
Magnetic Field ◽  
General Circulation ◽  
Hot Spot ◽  
Circulation Model ◽  
General Circulation Models ◽  
Atmospheric Models ◽  
Hot Gas ◽  
Magnetic Effects ◽  
Night Side ◽  
Night Flux

Abstract Ultrahot Jupiters represent an exciting avenue for testing extreme physics and observing atmospheric circulation regimes not found in our solar system. Their high temperatures result in thermally ionized particles embedded in atmospheric winds interacting with the planet’s interior magnetic field by generating current and experiencing bulk Lorentz force drag. Previous treatments of magnetic drag in 3D general circulation models (GCMs) of ultrahot Jupiters have mostly been uniform drag timescales applied evenly throughout the planet, which neglects the strong spatial dependence of these magnetic effects. In this work, we apply our locally calculated active magnetic drag treatment in a GCM of the planet WASP-76b. We find the effects of this treatment to be most pronounced in the planet’s upper atmosphere, where strong differences between the day and night side circulation are present. These circulation effects alter the resulting phase curves by reducing the hot spot offset and increasing the day–night flux contrast. We compare our models to Spitzer phase curves, which imply a magnetic field of at least 3 G for the planet. We additionally contrast our results to uniform drag timescale models. This work highlights the need for more careful treatment of magnetic effects in atmospheric models of hot gas giants.

MAGNETIC EFFECTS IN SUPERCONDUCTORS

1935 ◽  
Vol 12 (2) ◽  
pp. 265-271 ◽  
Author(s):  
F. G. A. Tarr ◽  
J. O. Wilhelm
Keyword(s):  
Magnetic Field ◽  
Transition Temperature ◽  
Applied Magnetic Field ◽  
Effective Permeability ◽  
Geometrical Shape ◽  
Magnetic Effects ◽  
The Magnetic Field

This paper deals with magnetic effects in metals cooled from above the transition temperature to below the superconducting temperature, while in an applied magnetic field. Previous work of Meissner and Ochsenfeld indicates that at the superconducting temperature the effective permeability of the metal became zero. It is found, however, that the effective permeability is greatly influenced by the composition and geometrical shape of the specimen. There is also, in general, a reduction in flux on removing the magnetic field after the superconducting temperature has been reached, but on re-establishing the field the flux through the specimen remains unchanged.

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