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Negative Magnetoresistance in Granular Bi - HTSC with Trapped Magnetic Fields
Magnetoresistive properties of granular Bi-based HTSC with trapped magnetic
fields are investigated in the temperature region near superconducting
transition . The effect of trapped field and transport current values and
orientations on the field dependence of magnetoresistance is studied. It is
found that for the magnetic field parallel and the current perpendicular to
trapping inducing field the field dependence of magnetoresistance is
nonmonotonic and magnetoresistance turns out to be negative for small fields.
The magnetoresistance sign inversion field increases roughly linear with the
trapped magnetic field and slightly decrease with transport current. The
results are explained in the framework of model of magnetic flux trapping in
granules or superconducting loops embedded in weak links matrix.Comment: 5 pages, 4 figures, submitted to conference LT2
On the emergence mechanism of lunar maria
Hypothetical emergence mechanism of lunar mari
Parquet: Regions of areal plastic dislocations (on Venus)
The extensive flat elevations of the Northern Hemisphere of Venus are covered with frequently intersecting lines of dislocations, resembling the outline of a giant parquet. In the internal sections of these regions we find grabens and regions of extension, and on the periphery lobe-shaped flow structures. The parquet was formed after the beginning of the formation of the lava plains, but covered by the youngest lava. These structures apparently arose partly because of the dragging of blocks of crust by the asthenospheric flows, and partly in the gravitational sliding of such heated blocks in the partial melting of their base. It is possible that these elevations occupy on Venus the place of the Earth's rift systems
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