Niu, Heng Yoon, Han Gyu Kwon, Hee Young Cheng, Zhiyuan Fu, Siqi Zhu, Hongying Miao, Bingfeng Sun, Liang Wu, Yizheng Schmid, Andreas K. Liu, Kai Won, Changyeon Ding, Haifeng Chen, Gong 2025-05-09T06:30:13Z 2025-05-09T06:30:13Z 2025-05-07 2025-04 https://pubs.kist.re.kr/handle/201004/152390 Magnetic skyrmionic structures, including magnetic skyrmions and antiskyrmions, are characterized by swirling spin textures with non-trivial topologies. They are featured with specific topological charges, Q, which are of crucial importance in determining their topological properties. Owing to the invariance of the chiral nature, it is generally believed that Q is conserved in a given magnetic skyrmionic structure and is hard to alter. Here, we experimentally realize the control of Q of magnetic skyrmionic structures at room temperature in a Dzyaloshinskii-Moriya interaction (DMI) platform with spatially alternating signs. Depending on how many times it crosses the interfaces between DMI regions with opposite signs, the magnetic skyrmionic structures possess different Q. Modifying the DMI energy landscape through chemisorbed oxygen, a magnetic topological transition is realized. This creation and manipulation of magnetic skyrmionic structures with controllable Q, in particular the DMI-stabilized thin-film antiskyrmions and high-Q skyrmionic structures, enables a new degree of freedom to control their dynamics via a novel DMI confinement effect. Our findings open up an unexplored avenue on various topological magnetic skyrmionic structures and their potential applications. English Nature Publishing Group Magnetic skyrmionic structures with variable topological charges in engineered Dzyaloshinskii-Moriya interaction systems Article 10.1038/s41467-025-58529-4 1 Nature Communications, v.16, no.1 Nature Communications 16 1 Y scie scopus 001465538200004 2-s2.0-105002970822 Multidisciplinary Sciences Science & Technology - Other Topics Article REAL-SPACE OBSERVATION LATTICE