Ferromagnetic Spin Glass State and Anomalous Hall Effect in Topological Semimetal Candidate Mn2Sb2Te5

TL;DR

This paper investigates Mn2Sb2Te5, revealing a spin glass magnetic state and anomalous Hall effect, highlighting its potential as a magnetic topological semimetal with unique quantum properties.

Contribution

It provides new insights into the magnetic and electronic properties of Mn2Sb2Te5, demonstrating its spin glass behavior and anomalous Hall effect, advancing understanding of magnetic topological materials.

Findings

Presence of spin glass state with field-induced ferromagnetism

Absence of long-range magnetic order from heat capacity

Significant impact of magnetization on electrical properties

Abstract

Materials that intrinsically possess both magnetism and topological states represent a key frontier of quantum materials research. Recently, Mn2(Bi/Sb)2Te5 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 Mn2Sb2Te5 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 Mn2Sb2Te5 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 Mn2Sb2Te5, establishing Mn2(Bi/Sb)2Te5 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.