Fig. 1.

System set-up and summary of dynamical responses. a Schematic of the system set-up. b Phase diagram of the reported three collective phases as follows (see Fig. 4c for a full-phase diagram). I Stripe pattern: when the magnetic dipole interaction is dominant, the rotors swing upwards or downwards in alternating stripes. II Quarter pattern: when the external field dominates over the dipolar interactions, the rotors undergo full rotations, with different quadrants of the array turning in different directions. III Staggered pattern: when the dipole interactions and the external field are comparable, the rotors show full rotations with the rotational direction forming a staggered pattern