We describe the construction of a fast field cycling device capable of sweeping a 4-order-of-
magnitude range of magnetic fields, from∼ 1 mT to 7 T, in under 700 ms, and which is
further extendable to a 1 nT-7 T range. Central to this system is a high-speed sample
shuttling mechanism between a superconducting magnet and a magnetic shield, with the
capability to access arbitrary fields in between with high resolution. Our instrument serves as
a versatile platform to harness the inherent dichotomy of spin dynamics on offer at low and …