Researchers from the RIKEN Center for Emergent Matter Science have managed for the first time to observe a square lattice of merons and antimerons - tiny magnetic vortices and antivortices. The magnetic merons (and antimerons) were formed in a thin plate of the helical magnet Co8Zn9Mn3.

The researchers were also able to induce a transformation between the square lattice of merons-antimerons and a hexagonal lattice of skyrmions, by finely varying a magnetic field applied perpendicularly to the thin film material.

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