TY - JOUR
T1 - Ferromagnetism in van der Waals compound MnS b1.8 B i0.2 T e4
AU - Chen, Yangyang
AU - Chuang, Ya Wen
AU - Lee, Seng Huat
AU - Zhu, Yanglin
AU - Honz, Kevin
AU - Guan, Yingdong
AU - Wang, Yu
AU - Wang, Ke
AU - Mao, Zhiqiang
AU - Zhu, Jun
AU - Heikes, Colin
AU - Quarterman, P.
AU - Zajdel, Pawel
AU - Borchers, Julie A.
AU - Ratcliff, William
N1 - Funding Information:
Y.C., Y-W.C., K.H., and J.Z. are supported by NSF through Grant NSF-DMR-1708972. Y.C. also acknowledges support by the China Scholarship Council. Support for crystal growth and characterization was provided by the National Science Foundation through the Penn State 2D Crystal Consortium-Materials Innovation Platform (2DCC-MIP) under NSF Cooperative Agreement DMR-1539916. Z.Q.M. also acknowledges the support of NSF-DMR-1707502. We thank Xia Hong and Cui-Zu Chang for helpful discussions. P. Z. would like to thank Professor J. Kusz for help with single-crystal measurements and the support of NIST through the Guest Researcher Program. We acknowledge useful contributions by Sergiy Gladchenko for the development of sample environment for the experiments at the NCNR.
Publisher Copyright:
© 2020 American Physical Society. US.
PY - 2020/6
Y1 - 2020/6
N2 - The intersection of topology and magnetism represents a new playground to discover novel quantum phenomena and device concepts. In this work, we show that under certain synthetic conditions, a van der Waals single-crystalline compound MnSb1.8Bi0.2Te4 exhibits a net ferromagnetic state with a Curie temperature of 26 K, in contrast to the fully compensated antiferromagnetic order observed previously for other members of the Mn(Sb,Bi)2Te4 family. We employ magneto-transport, bulk magnetization, x-ray and neutron scattering studies to illustrate the structural, magnetic, and electrical properties of MnSb1.8Bi0.2Te4. Our structural analyses reveal considerable Mn-Sb site mixing and suggest a recently proposed mechanism, where Mn occupying the Sb site mediates a ferromagnetic coupling between Mn layers [Murakami, Phys. Rev. B 100, 195103 (2019)10.1103/PhysRevB.100.195103], could be at play. Close comparisons made to an antiferromagnetic compound MnSb2Te4 illustrate the subtle magnetic interactions of the system and the important role played by local chemistry. The appearance of an unusual anomalous Hall effect in MnSb1.8Bi0.2Te4 at low temperatures hints at a magnetic ground state different from other members of this family. Our results are an important step in the synthesis and understanding of magnetism in materials with topological characteristics.
AB - The intersection of topology and magnetism represents a new playground to discover novel quantum phenomena and device concepts. In this work, we show that under certain synthetic conditions, a van der Waals single-crystalline compound MnSb1.8Bi0.2Te4 exhibits a net ferromagnetic state with a Curie temperature of 26 K, in contrast to the fully compensated antiferromagnetic order observed previously for other members of the Mn(Sb,Bi)2Te4 family. We employ magneto-transport, bulk magnetization, x-ray and neutron scattering studies to illustrate the structural, magnetic, and electrical properties of MnSb1.8Bi0.2Te4. Our structural analyses reveal considerable Mn-Sb site mixing and suggest a recently proposed mechanism, where Mn occupying the Sb site mediates a ferromagnetic coupling between Mn layers [Murakami, Phys. Rev. B 100, 195103 (2019)10.1103/PhysRevB.100.195103], could be at play. Close comparisons made to an antiferromagnetic compound MnSb2Te4 illustrate the subtle magnetic interactions of the system and the important role played by local chemistry. The appearance of an unusual anomalous Hall effect in MnSb1.8Bi0.2Te4 at low temperatures hints at a magnetic ground state different from other members of this family. Our results are an important step in the synthesis and understanding of magnetism in materials with topological characteristics.
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U2 - 10.1103/PhysRevMaterials.4.064411
DO - 10.1103/PhysRevMaterials.4.064411
M3 - Article
AN - SCOPUS:85088515077
SN - 2475-9953
VL - 4
JO - Physical Review Materials
JF - Physical Review Materials
IS - 6
M1 - 064411
ER -