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. 2022 Jan 18;127(1):e2021JB023239. doi: 10.1029/2021JB023239

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© 2021. The Authors.

This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Numerically simulated zero‐field magnetic states in idealized chains of identical magnetosomes with dipolar interactions but no magnetic anisotropy. The magnetic moments of individual crystals are indicated by arrows with the color coding corresponding to the axial component. (a) High‐moment (SD‐like) state of a single‐stranded chain with 15 magnetosomes. (b) Two‐domain state of the same chain as in (a), during a thermally activated magnetization reversal. (c) High‐moment state of a ring with 20 magnetosomes, consisting of two symmetric domains with opposed vorticity. (d) Low‐moment, flux‐closure (FC) state of the same ring as in (c). (e) High‐moment (SD‐like) state of a double‐stranded chain with 11 + 10 staggered magnetosomes. (f) Low‐moment (FC) state of the same double‐stranded chain as in (e). See Movies [Link], [Link], [Link], [Link] for the corresponding transitions between states.