Magnetic detection coil and apparatus for measurement of magnetic field

摘要

A magnetic detection coil is provided, which includes a plurality of differential coils. Each differential coil is made of one of superconductors and metallic materials. The differential coils having mutually different loop directions are arranged in parallel at a spatially predetermined distance apart and mutually electrically connected in series. Each differential coil is one of a first-order differential coil and a second-order differential coil.