Nano-wires consisting of alternating magnetic/nonmagnetic layers act as magnetic sensors. Bronze is usually nonmagnetic, but certain alloys containing iron or nickel may have magnetic properties. This particular setup is ideal for large free form nonmagnetic workpieces such as glass optics. Chlorographene is a nonmagnetic semiconductor with 1.2 eV direct band gap. The sequence is capped by a magnetic to nonmagnetic ferricrete known locally as "canga". The building is a single-story structure, square, and is built entirely out of nonmagnetic materials. To optimize the movement of the core, the core tube needs to be nonmagnetic.