Magnetoresistivity and Size Effects in Aluminum Hyperconductors

Anomalous magnetoresistivity had been previously observed in aluminum hyper-conductors and several explanations had been proposed. A statistical matrix of 16 distinct hyperconductor designs was fabricated to evaluate the effects of deformation processes and critical design features on key properties — including magnetoresistivity. Magneto-resistance measurements have been completed at magnetic field strengths from 0 to 8 T and temperatures from 12 K to 30 K for some of the hyperconductors from this group. Although not complete, these results refute some explanations for increased magneto-resistivity in aluminum composite hyperconductors. There are possible interaction effects between magnetic field strength and filament size or condition of strain which are relevant to anomalous magnetoresistivity; and these will also be discussed.