A synthetic macroscopic magnetic unipole

Abstract

We demonstrate experimentally with a prototype for the first time, that an artificial emergent magnetic unipole hedgehog field in a simply connected three-dimensional domain is possible, emulating effectively the Dirac model by simply using a novel permanent magnets’ topology and geometrical arrangement in a ring array. Although similar effects were demonstrated by others over the last decade, with these effects usually observed and lasting for a small fraction in time and applied at the quantum or microscopic scale using primary BECs, Skyrmions, Spin Ice and recently Chiral Magnets this was never shown until now and performed at the macro scale and by using normal magnets. The synthetic magnetic unipole ring array prototype progressively twists and steers the magnetic flux into vanishing curl field (i.e. vortex) geometry towards the centre of the ring and its air cap. This mere act alone proves enough to create the desired effect and an apparent isolated magnetic unipole region is observed at the centre of this magnetic ring array, as we have mapped with a 3-axis magnetometer and show with the quantum magnetic-optic device flux viewer, the ferrolens. This apparent unipolar magnetic array exhibits anomalous behavior at its centre, air cap and registers with a magnetometer or a normal compass needle as having the same magnetic polarity on both opposite faces of the ring on the same axis passing through the centre of the ring. Also the other opposite polarity pole is dispersed and confined along the periphery of the ring array with a 90° angle to the unipole axis and none existing in the far field and nowhere to be found. Even in the near field, counting the total number of discrete poles of the magnets of the array including its emergent unipole at the centre, counts to an odd number. The results were analyzed and software simulated and some interesting conclusions are drawn about the ultimate quantum vortex nature of ferromagnetism.