Xu, YB Hirohata, A Lopez-Diaz, L Leung, HT Tselepi, M Gardiner, SM Lee, WY Bland, JAC Rousseaux, F Cambril, E Launois, H 2024-01-21T14:05:53Z 2024-01-21T14:05:53Z 2021-09-01 2000-05-01 0021-8979 https://pubs.kist.re.kr/handle/201004/141398 The domain structures of epitaxial Fe (20 nm)/GaAs(100) circular dot arrays (diameters from 50 to 1 mu m) were studied with magnetic force microscopy. A transition from a single domain to a multidomain remanent state was observed upon reducing the dot diameter beneath 10 mu m in dot arrays with the separation twice the dot diameter. When the separation is reduced to half the dot diameter, the single domain states were found to "collapse" into stripe-like multidomain states due to local dipole coupling between dots. Micromagnetic simulations further suggest that for ultrathin Fe dots of less than about 2 nm thickness the diameter does not have a significant influence on the domain structures due to a dramatic reduction of the dipole energy. (C) 2000 American Institute of Physics. [S0021-8979(00)47608-5]. English AMER INST PHYSICS ELEMENTS MAGNETIZATION FILMS Micromagnetism in mesoscopic epitaxial Fe dot arrays Article 10.1063/1.372917 1 JOURNAL OF APPLIED PHYSICS, v.87, no.9, pp.7019 - 7021 JOURNAL OF APPLIED PHYSICS 87 9 7019 7021 scie scopus 000086728800369 Physics, Applied Physics Article; Proceedings Paper ELEMENTS MAGNETIZATION FILMS domain wall submicron ferromagnetic elements switching field