Defect-mediated ferromagnetism in correlated two-dimensional transition metal phosphorus trisulfides.

Autor: Wang F; CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China.; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., Mathur N; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., Janes AN; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., Sheng H; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., He P; CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China., Zheng X; Department of Materials Science and Engineering, Stanford University, Stanford, CA 94305, USA., Yu P; CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China., DeRuiter AJ; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., Schmidt JR; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA., He J; CAS Center for Excellence in Nanoscience, CAS Key Laboratory of Nanosystem and Hierarchical Fabrication, National Center for Nanoscience and Technology, Beijing 100190, P. R. China.; Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, School of Physics and Technology, Wuhan University, Wuhan 430072, P. R. China., Jin S; Department of Chemistry, University of Wisconsin-Madison, 1101 University Avenue, Madison, WI 53706, USA.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2021 Oct 22; Vol. 7 (43), pp. eabj4086. Date of Electronic Publication: 2021 Oct 22.
DOI: 10.1126/sciadv.abj4086
Abstrakt: Controlling the magnetic spin states of two-dimensional (2D) van der Waals (vdW) materials with strong electronic or magnetic correlation is important for spintronic applications but challenging. Crystal defects that are often present in 2D materials such as transition metal phosphorus trisulfides (MPS 3 ) could influence their physical properties. Here, we report the effect of sulfur vacancies on the magnetic exchange interactions and spin ordering of few-layered vdW magnetic Ni 1− x Co x PS 3 nanosheets. Magnetic and structural characterization in corroboration with theoretical calculations reveal that sulfur vacancies effectively suppress the strong intralayer antiferromagnetic correlation, giving rise to a weak ferromagnetic ground state in Ni 1− x Co x PS 3 nanosheets. Notably, the magnetic field required to tune this ferromagnetic state (<300 Oe) is much lower than the value needed to tune a typical vdW antiferromagnet (> several thousand oersted). These findings provide a previously unexplored route for controlling competing correlated states and magnetic ordering by defect engineering in vdW materials.
Databáze: MEDLINE
Externí odkaz: