Chains of asymmetric nanodots were modelled, using micromagnetic simulations, to verify the possibility to introduce magnetic domain-walls. For this, a combination of an anisotropy, defining the direction in which the domain wall should move, with alternating magnetic fields of suitable frequency and amplitude was found to be necessary.
In this way, a much more stable domain wall injection and motion could be achieved than in continuous wires without artificial breaks or other periodic spatial modifications. This offers new possibilities to study domain walls which are of large technological interest for applications in spintronics or magnetic memory devices.
X.-P. Ma, S.-D. Kim, H. G. Piao, D.-H. Kim
Field-controllable injection of virtual magnetic domainwall in discrete magnetic nanodot chains
Current Applied Physics 18, 50-54 (2018)