Magnetic Möbius stripe

Magnetic Möbius stripe without frustration: Noncollinear metastable states.
S. Castillo-Sepúlveda, R. A. Escobar, D. Altbir, M. Krizanac, and E. Y. Vedmedenko
Phys. Rev. B 96, 024426 (2017)

Equilibrium MC configuration of a chain consisting of 100 moments for $D=1,K=0.4$ meV, $J=-40$ meV: (a) closed KB configuration and (b) the same shown with open ends for clarity.

DW annhilation in wires

Annihilation of domain walls in a ferromagnetic wire.

Anirban Ghosh, Kevin S. Huang, and Oleg Tchernyshyov

Phys. Rev. B 95, 180408(R) (2017)

Several configurations of a pair of domain walls with shown values of separation $\zeta$ and twist $\phi$. The red and blue colors denote positive and negative magnetization component $m_z$ along the axis of the cylinder. The wire frames depict the local plane tangential to the magnetization field. Spheres on the right show the path of the magnetization field $m\left(z\right)$ as $z$ goes from $-\infty$ to $+\infty$, beginning from and ending at the north pole (red). The south pole (blue) can only be reached if the separation of the domain walls $\zeta =\infty$.

Review on topological effects on nanomagnetism

Topological effects in nanomagnetism: from superparamagnetism to chiral quantum solitons.
Hans-Benjamin Braun
Advances in Physics 61, 1 (2012)

Magnetic cactus

Static and Dynamical Phyllotaxis in a Magnetic Cactus.
Cristiano Nisoli, Nathaniel M. Gabor, Paul E. Lammert, J. D. Maynard, and Vincent H. Crespi
Phys. Rev. Lett. 102, 186103 (2009)

A specimen of Mammillaria elongata displaying a helical morphology ubiquitous to nature, a magnetic cactus of dipoles on stacked bearings, and a schematic of a wrapped Bravais lattice showing the angular offset (screw angle) and the axial separation a between particles.