Robust ferromagnetism in zigzag-edge rich MoS2 pyramids

Abstract

The intrinsic magnetism of MoS₂ has been extensively investigated via simulations, but few reliable experimental results have been explored. Herein, we develop zigzag-edge rich layered structural MoS₂ pyramids via chemical vapor deposition, triggering exceptional ferromagnetism. The magnetic measurements revealed the robust ferromagnetism of MoS₂ pyramids compared with MoS₂ flakes. The existence of ferromagnetism was mostly attributed to the presence of abundant zigzag-edges in the layered pyramids, confirmed by transmission electron microscopy, vibrating sample magnetometry, and magnetic force microscopy. Moreover, a clearly identified remnant and switchable magnetic moment was revealed for the first time in the MoS₂ pyramid. This study provides sound evidence with the zigzag-edge induced ferromagnetism of the MoS₂ materials, promising potential magnetic and spintronic applications.