Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1988-07-25
1990-06-05
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324226, 324262, 505843, G01N 2772, G01R 3312
Patent
active
049317326
ABSTRACT:
A cantilever beam is employed to place a magnet in proximity to a sample while the sample is maintained at a superconducting temperature. The magnet causes the sample, assuming it is superconductive, to itself generate a magnetic field which interacts with the magnet. Means are provided for measuring the movement of the cantilever beam, such movement being a measure of the interaction of the sample's magnetic field with the magnet. Several types of cantilever beams are disclosed, one of which is adapted to move in a direction orthogonal to the surface of the sample and another of which is adapted to move parallel to the surface of the sample. This enables the obtaining of quantitative measurements of the bulk properties of high temperature superconducting materials.
REFERENCES:
patent: 2750561 (1956-06-01), Gross
Method for Making Low-Resistivity Contacts to High T.sub.c Superconductors, Ekin et al., Appl. Phys. Lett. 52 (4), 25 Jan. 1988, pp. 331-333.
Equilibrium of a Magnet Floating Above a Superconducting Disk, Williams et al., Appl. Phys. Lett. 52(9), 29 Feb. 1988, pp. 751-752.
Cornell Research Foundation Inc.
Eisenzopf Reinhard J.
Snow Walter E.
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