The Cubic B20 Chiral Magnet FeGe

The cubic B20 chiral magnet FeGe has garnered significant attention for its exceptional capacity to host topological skyrmions. These skyrmions are not only compact, with dimensions ≈80 nm, but also display exceptional stability near room temperature. Moreover, high‐quality cubic FeGe single crystals and nanostructures are successfully fabricated. These characteristics make cubic FeGe an intriguing material for the investigation of topological magnetism and its potential applications in spintronics. Recognizing the critical role that cubic FeGe plays in the field of magnetism, this review delves into the material, emphasizing the synthesis methods for FeGe single crystals and nanostructures, as well as the distinctive features of the topological magnetic structures they support. This study particularly highlight the progress in controlling the magnetic structures for device applications. The electric controllability of topological skyrmions in FeGe nanostructures is discussed as a pivotal step toward the development and application of skyrmionic devices.