Recently, the research team of low-power quantum materials in the High Magnetic Field Science Center of the Chinese Academy of Sciences Hefei Institute of Physical Sciences has made progress in the construction of topological magnetic structures. The relevant research results are published in Nature Communications.

Topological magnetic structures are a type of spin arrangement with non mediocre topological characteristics, which have the advantages of small size, high stability, and easy current manipulation. They are expected to be used as the next generation of data carriers to construct magnetoelectronic devices that break through the limitations of traditional magnetic storage technologies. In the early stage, the team proposed a reverse magnetic field method to controllable induce the generation of multi topological magnetic structures, and observed magnetic beams in the chiral helical magnetic material FeGe.

A stable magnetic beam at room temperature and zero magnetic field is a prerequisite for the practical application of multi topological charged spintronic devices, while in the past, magnetic beams were achieved under low temperature and magnetic field conditions. The team utilized a combination of pulsed current and reverse magnetic field in the room temperature chiral spiral magnetic material Co8Zn10Mn2 to achieve abundant room temperature chiral magnetic beams, avoiding the complex field cooling operation necessary for previous magnetic beam generation processes. Furthermore, this study proposes a special zero magnetic field vertical spiral domain magnetization background to stabilize the physical mechanism of magnetic beams, establishes a complete magnetic field temperature phase diagram of magnetic beams, and achieves stable existence of isolated magnetic beams at zero magnetic field room temperature under free boundary conditions.

The research work was supported by the National Natural Science Foundation of China and the Chinese Academy of Sciences Young Team Program for Stable Support in Basic Research.

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