Magnetic Field Inside Windings; a Key Parameter in the Proximity Effect Equation

The proximity effect of the ferromagnetic metal/superconductor (FM/S) bilayers in а external longitudinal magnetic field is considered in the dirty limit. The critical temperature and the superconducting current distribution versus applied magnetic field’s magnitude, film’s thicknesses and a transparency of the contact is calculated, with taking into account аn umklapp processes possibility on the interface of the FM/S contact. It is shown that superconducting current is strictly inhomogeneous and asymmetrical. It is shown also that the current inhomogeneity depends heavily from the FM/S interface transparency.

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Proximity Effect as a Probe of Electronic Correlations and Exchange Field in Dirty Ferromagnet/Superconductor Nanostructures

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.152-153.457 ◽

2009 ◽

Vol 152-153 ◽

pp. 457-461

Author(s):

Larisa A. Terentieva ◽

Elena L. Parfenova ◽

Mansur G. Khusainov ◽

Yurii N. Proshin

Keyword(s):

Magnetic Field ◽

Critical Temperature ◽

Proximity Effect ◽

Order Parameter ◽

Weak Magnetic Field ◽

Exchange Field ◽

Electronic Correlations ◽

Electron Repulsion ◽

Parameter Symmetry ◽

Order Parameter Symmetry

We investigate the interplay between the BCS and 2D Larkin-Ovchinnikov-Fulde-Ferrell (LOFF) states in the dirty thin ferromagnetic metal/superconductor (FM/S) nanostructures. For the FM/S bilayers we have derived the dependencies of critical temperature on the FM layer exchange field, electronic correlations and thickness. Moreover, in the corresponding FM/S/FM trilayers we predict two new π phase superconducting states with electron-electron repulsion in the FM layers. The 2D modulated LOFF states are possible in such trilayers only in presence of a weak magnetic field and at suitable parameters of the FM and S layers. On this base we originally propose the method of proximity effect probe the magnitude and sign of the electronic correlations, the order parameter symmetry and exchange fields in various FM layers.

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Magnetic field asymmetry at external phases of shielded single-pole three-phase flat high-current busduct

ITM Web of Conferences ◽

10.1051/itmconf/20192801007 ◽

2019 ◽

Vol 28 ◽

pp. 01007

Author(s):

Dariusz Kusiak ◽

Tomasz Szczegielniak ◽

Zygmunt Piątek

Keyword(s):

Magnetic Field ◽

Field Distribution ◽

Proximity Effect ◽

Eddy Currents ◽

Skin Effect ◽

High Current ◽

Current Frequency ◽

Three Phase ◽

The Magnetic Field ◽

Outer Area

The article shows the total magnetic field distribution in two outer conductors of the flat, three-phase single-pole shielded, high-current busduct is asymmetric. The phase currents in the shielded conductors decide about the magnetic field of such a high-current busduct. The components of this field reflect the magnetic field of the reverse reaction fields of the eddy currents induced in the conductors of the adjacent phases as the results of the proximity effect and the skin effect. The field distribution is shown in the outer area of the outer phases as the function of the parameters reflecting the current frequency, the conductivity, and the transverse dimensions of the tubular conductors.

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Proximity‐effect winding loss in different conductors using magnetic field averaging

COMPEL The International Journal for Computation and Mathematics in Electrical and Electronic Engineering ◽

10.1108/03321641211267128 ◽

2012 ◽

Vol 31 (6) ◽

pp. 1793-1814 ◽

Cited By ~ 20

Author(s):

Rafal Piotr Wojda ◽

Marian Kazimierz Kazimierczuk

Keyword(s):

Magnetic Field ◽

Proximity Effect ◽

Winding Loss

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Proximity Effect for Asymmetrical Three-Layered FS Structures in External Magnetic Field

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.190.387 ◽

2012 ◽

Vol 190 ◽

pp. 387-390

Author(s):

Maxim Avdeev ◽

Yurii N. Proshin ◽

Mansur G. Khusainov ◽

Sergey Tsarevskii

Keyword(s):

Magnetic Field ◽

Critical Temperature ◽

External Magnetic Field ◽

Boundary Value Problem ◽

Proximity Effect ◽

Boundary Value ◽

Netic Field

We study asymmetrical three-layers F1F2S and F1SF2 structures in an external parallelmag-netic field. Assuming that all F and S layers are dirty, we solve the boundary value problem for theUsadel function. We calculate the critical temperature of in the F1F2S and F1SF2 systems as functionof the F layers thicknesses and external magnetic field.

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Thermoelectrically Driven Melt Motion During Floating Zone Crystal Growth With an Axial Magnetic Field

Journal of Fluids Engineering ◽

10.1115/1.2820748 ◽

1998 ◽

Vol 120 (4) ◽

pp. 839-843 ◽

Cited By ~ 7

Author(s):

Y. Y. Khine ◽

J. S. Walker

Keyword(s):

Magnetic Field ◽

Crystal Growth ◽

Axial Magnetic Field ◽

Azimuthal Velocity ◽

Liquid Interfaces ◽

Floating Zone ◽

Semiconductor Crystal ◽

Electrical Conductivities ◽

Solid Liquid ◽

Key Parameter

During semiconductor crystal growth with an externally applied magnetic field, thermoelectric currents may drive a melt circulation which affects the properties of the crystal. This paper treats a model problem for a floating zone process with a uniform axial magnetic field, with planar solid-liquid interfaces, with a cylindrical free surface, with a parabolic temperature variation along the crystal-melt interface, and with an isothermal feed rod-melt interface. The ratio of the electrical conductivities of the liquid and solid is a key parameter. The azimuthal velocity is much larger than the radial or axial velocity. There is radially outward flow near the crystal-melt interface which should be beneficial for the mass transport of dopants and species.

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