16 April 2024 | Xiaowei Lv, Hualiang Lv, Yalei Huang, Ruixuan Zhang, Guanhua Qin, Yihui Dong, Min Liu, Ke Pei, Guixin Cao, Jincang Zhang, Yuxiang Lai & Renchao Che
This study reports the experimental observation of distinct skyrmion phases at room temperature in the two-dimensional ferromagnet Fe3GaTe2 (FGT). The research highlights the coexistence of Bloch and hybrid skyrmions, which exhibit both Bloch and hybrid characteristics. Analysis of magnetic intensities under varied imaging conditions, coupled with complementary simulations, reveals that spontaneous Bloch skyrmions exist as the magnetic ground state, coexisting with hybrid stripes domains. The interplay between dipolar interaction and Dzyaloshinskii-Moriya interaction (DMI) stabilizes these mixed skyrmion phases. Hybrid skyrmions are also created and show high thermostability, enduring up to 328 K. These findings open new perspectives for 2D spintronic devices, as they offer additional degrees of freedom and potential for improved properties in topology-based spintronics. The study also discusses the significance of zero-field Bloch skyrmions and the potential for eliminating the skyrmion Hall effect, which is a major obstacle in topology-based memories. The high thermostability of the coexisting phases further enhances their potential for practical applications in 2D spintronic devices.This study reports the experimental observation of distinct skyrmion phases at room temperature in the two-dimensional ferromagnet Fe3GaTe2 (FGT). The research highlights the coexistence of Bloch and hybrid skyrmions, which exhibit both Bloch and hybrid characteristics. Analysis of magnetic intensities under varied imaging conditions, coupled with complementary simulations, reveals that spontaneous Bloch skyrmions exist as the magnetic ground state, coexisting with hybrid stripes domains. The interplay between dipolar interaction and Dzyaloshinskii-Moriya interaction (DMI) stabilizes these mixed skyrmion phases. Hybrid skyrmions are also created and show high thermostability, enduring up to 328 K. These findings open new perspectives for 2D spintronic devices, as they offer additional degrees of freedom and potential for improved properties in topology-based spintronics. The study also discusses the significance of zero-field Bloch skyrmions and the potential for eliminating the skyrmion Hall effect, which is a major obstacle in topology-based memories. The high thermostability of the coexisting phases further enhances their potential for practical applications in 2D spintronic devices.