Scientists in Spain have created microscopic “magnetic flowers” that enhance magnetic fields in a small area.These flower-shaped structures, made from a nickel-iron alloy, could lead to more powerful sensors and lower energy use for magnetic devices.By changing the shape, size, and number of petals, researchers can control the enhancement of the magnetic field.The microflowers could increase the sensitivity of magnetic sensors by over 100 times, allowing them to detect weaker magnetic signals.