Ferromagnetic spin glass state and anomalous Hall effect in topological semimetal candidate Mn 2 Sb 2 Te 5

Abstract Materials that intrinsically possess both magnetism and topological states represent a key frontier of quantum materials research. Recently, Mn 2 (Bi/Sb) 2 Te 5 has emerged as a promising candidate for hosting topological surface states coupled with intrinsic magnetic order, making it a potential magnetic Weyl semimetal. In this study, we investigate the magnetic and transport properties of Mn 2 Sb 2 Te 5 single crystals. The magnetization measurements reveal a spin glass state with field-induced ferromagnetism. Although heat capacity measurement indicates the absence of long-range order, the intrinsic magnetization in Mn 2 Sb 2 Te 5 significantly affects its electrical properties, as demonstrated by the anomalous Hall effect. This work provides valuable insights into the magnetism and the electronic properties of Mn 2 Sb 2 Te 5 , establishing Mn 2 (Bi/Sb) 2 Te 5 system as a compelling platform for exploring the interplay between magnetism and non-trivial band topology, enabling emergent quantum phases and novel transport responses not accessible in non-magnetic systems.