Precise Tuning of Skyrmion Density in a Controllable Manner by Ion Irradiation

• DOI: 10.1021/acsami.2c07268
• Publication Date: 2022-07-06T01:20:20Z
• Authors: Yue Hu; Senfu Zhang; Yingmei Zhu; Chengkun Song; Junfeng Huang; Chen Liu; Xuan Meng; Xia Deng; Liu Zhu; Chaoshuai Guan; Hongxin Yang; Mingsu Si; Junwei Zhang; Yong Peng
• Keywords: Skyrmion

Magnetic skyrmions are topologically protected spin textures that were found to be promising candidates for next-generation spintronic devices owing their small size and unique current-induced dynamics. Increasing density at designated locations in a controllable manner is prerequisite further improve the recording of magnetic memory relevant spintronics. Here, we demonstrate sharp increase skyrmion multilayer films can purposefully realized site-specific position by ion irradiation, which has industrial applicability. The Cs-scanning transmission electron microscopy micromagnetic simulation results indicate sharply increased five times after applying an exposure with irradiation dose 1.5 × 1014 Ga+/cm2, field required create also reduced. intrinsic physical mechanism increasing mainly originate from formation disorders through Ga+ induce decrease nucleation energy barrier skyrmions. We show artificial patterns tunable intentionally written specific sites using beam. This work should contribute significant step toward eventually realizing practical application