Magnetic measurement of the critical current anisotropy in coated conductors

Details Magnetic measurement of the critical current anisotropy in coated conductors Magnetic measurement of the critical current anisotropy in coated conductors

2011-01-10

arxiv.org/abs/1101.1788v1

Supercond. Sci. Technol. 24 (2011) 045002

Physics

Condensed Matter

Superconductivity

11 pages, 6 figures

Scientific paper

10.1088/0953-2048/24/4/045002

We determine the critical current anisotropy at maximum Lorentz force from hysteresis loops in a vibrating sample magnetometer. To eliminate the signal of spurious variable Lorentz force currents it is sufficient to cut the sample to a specific length, which is calculated from the position dependent sensitivity of the instrument. The procedure increases the resolution of the measurement and the results compare well to transport data on the same sample. As the electric field in magnetisation measurements is lower than in transport experiments the anisotropy at high currents (low temperatures and fields) can be measured without the need of making current contacts or any special sample preparation.

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