title: Programmability of Co-antidot lattices of optimized geometry.
abstract: Programmability of stable magnetization configurations in a magnetic device is a highly desirable feature for a variety of applications, such as in magneto-transport and spin-wave logic. Periodic systems such as antidot lattices may exhibit programmability; however, to achieve multiple stable magnetization configurations the lattice geometry must be optimized. We consider the magnetization states in Co-antidot lattices of ≈50 nm thickness and ≈150 nm inter-antidot distance. Micromagnetic simulations were applied to investigate the magnetization states around individual antidots during the reversal process. The reversal processes predicted by micromagnetics were confirmed by experimental observations. Magnetization reversal in these antidots occurs via field driven transition between 3 elementary magnetization states - termed G, C and Q. These magnetization states can be described by vectors, and the reversal process proceeds via step-wise linear operations on these vector states. Rules governing the co-existence of the three magnetization states were empirically observed. It is shown that in an n × n antidot lattice, a variety of field switchable combinations of G, C and Q can occur, indicating programmability of the antidot lattices.
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Technische Universität Chemnitz, Institute of Physics, 09107 Chemnitz, Germany.
authors.forename: Tobias
authors.initials: T
authors.lastname: Schneider
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Technische Universität Dresden, Department of Physics, 01069 Dresden, Germany.
authors.forename: Manuel
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authors.lastname: Langer
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russia.
authors.forename: Julia
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authors.lastname: Alekhina
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Technische Universität Dresden, Department of Physics, 01069 Dresden, Germany.
authors.forename: Ewa
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authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Technische Universität Dresden, Department of Physics, 01069 Dresden, Germany.
authors.forename: Antje
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authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Lomonosov Moscow State University, Faculty of Physics, 119991 Moscow, Russia.
authors.forename: Anna
authors.initials: A
authors.lastname: Semisalova
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
authors.forename: Andreas
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authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
authors.forename: Kilian
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authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
authors.forename: Kay
authors.initials: K
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authors.affiliation: University of Western Australia, School of Physics, 6009 Crawley, Australia.
authors.forename: Mikhail P
authors.initials: MP
authors.lastname: Kostylev
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.|Technische Universität Dresden, Department of Physics, 01069 Dresden, Germany.
authors.forename: Jürgen
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authors.lastname: Fassbender
authors.affiliation: National University of Singapore, Department of Electrical and Computer Engineering, 117576 Singapore.
authors.forename: Adekunle O
authors.initials: AO
authors.lastname: Adeyeye
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
authors.forename: Jürgen
authors.initials: J
authors.lastname: Lindner
authors.affiliation: Helmholtz-Zentrum Dresden-Rossendorf, Institute of Ion Beam Physics and Materials Research, 01328 Dresden, Germany.
authors.forename: Rantej
authors.initials: R
authors.lastname: Bali