A piece of metal smaller than a millimeter, when cooled to minus 256 degrees Celsius, behaves like a kaleidoscope: in one corner, magnetic arrows align in neat rows, while in a neighboring corner, they twist into a screw. This was observed by directing a narrow X-ray beam at the sample and slowly sweeping it across the surface, like a flashlight along a dark wall.

Usually, such materials are studied by illuminating the entire crystal at once. The result is an averaged picture, like looking at a mosaic from afar and seeing just a gray blur. Here, however, an X-ray beam thinner than a human hair revealed that two distinct magnetic patterns coexist within the same piece. One resembles water waves frozen into parallel stripes; the other, a spiral staircase where each successive turn is rotated relative to the previous one.

The most surprising part is that these two patterns are not chaotically mixed but occupy different regions of the sample, like separate rooms in a house. Moreover, the transition from one order to the other does not occur gradually but in a jump when the temperature changes by a few degrees. This means the material 'chooses' which pattern is more favorable, depending on tiny differences in composition or strain in the crystal lattice.

Such inhomogeneity is not rare for magnetic materials, but it usually goes unnoticed because standard methods give an averaged picture. Here, scanning with an X-ray beam revealed that magnetic order is not a single pattern across the crystal but a patchwork of different textures. This changes the way we think about designing magnetic devices: perhaps we need to consider not just average properties but the spatial distribution of magnetic domains.