86 research outputs found
Large Predicted Self-Field Critical Current Enhancements In Superconducting Strips Using Magnetic Screens
A transport current distribution over a wide superconducting sheet is shown
to strongly change in a presence of bulk magnetic screens of a soft magnet with
a high permeability. Depending on the geometry, the effect may drastically
suppress or protect the Meissner state of the sheet through the enhancement or
suppression of the edge barrier critical current. The total transport current
in the magnetically screened Meissner state is expected to compete with the
critical current of the flux-filled sheet only for samples whose critical
current is initially essentially controlled by the edge barrier effect.Comment: 6 figure
Overcritical states of a superconductor strip in a magnetic environment
A current-carrying superconducting strip partly penetrated by magnetic flux
and surrounded by a bulk magnet of high permeability is considered. Two types
of samples are studied: those with critical current controlled by an edge
barrier dominating over the pinning, and those with high pinning-mediated
critical current masking the edge barrier.It is shown for both cases that the
current distribution in a central flux-free part of the strip is strongly
affected by the actual shape of the magnetic surroundings. Explicit analytical
solutions for the sheet current and self-field distributions are obtained which
show that, depending on the geometry, the effect may suppress the total
loss-free transport current of the strip or enhance it by orders of magnitude.
The effect depends strongly on the shape of the magnet and its distance to the
superconductor but only weakly on the magnetic permeability.Comment: 20 pages, 20 figure
Deep Eutectic Solvents (DESs) and their applications [forthcoming]
Deep Eutectic Solvents (DESs) and Their Application
III–V semiconductors
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