Spin-Glass States Generated in a van der Waals Magnet by Alkali-Ion Intercalation.

Autor: Khan S; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Aw ESY; Department of Physics & Astronomy, University College London, London, WC1H 0AH, UK., Nagle-Cocco LAV; Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK., Sud A; RIEC, Tohoku University, 2-1-1, Katahira, Aoba-ku, Sendai, 980-0812, Japan.; FRIS, Tohoku University, 6-3, Aramaki, Aoba-Ku, Sendai, 980-0845, Japan., Ghosh S; Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD, UK., Subhan MKB; Department of Physics & Astronomy, University College London, London, WC1H 0AH, UK., Xue Z; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Freeman C; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Sagkovits D; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Gutiérrez-Llorente A; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK.; Escuela Superior de Ciencias Experimentales y Tecnología, Universidad Rey Juan Carlos, Madrid, 28933, Spain., Verzhbitskiy I; Physics Department, National University of Singapore, Singapore 117551, Singapore., Arroo DM; Department of Materials, Imperial College London, Exhibition Road, London, SW7 2AZ, UK., Zollitsch CW; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Eda G; Physics Department, National University of Singapore, Singapore 117551, Singapore.; Department of Chemistry, National University of Singapore, Singapore, 117543, Singapore.; Centre for Advanced 2D Materials, National University of Singapore, Singapore, 117542, Singapore., Santos EJG; Institute for Condensed Matter Physics and Complex Systems, School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3FD, UK.; Higgs Centre for Theoretical Physics, The University of Edinburgh, Edinburgh, EH9 3FD, UK.; Donostia International Physics Center, Donostia-San Sebastián, 20018, Spain., Dutton SE; Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE, UK., Bramwell ST; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK., Howard CA; Department of Physics & Astronomy, University College London, London, WC1H 0AH, UK., Kurebayashi H; London Centre for Nanotechnology, University College London, London, WC1H 0AH, UK.; WPI-AIMR, Tohoku University, 2-1-1, Katahira, Sendai, 980-8577, Japan.; Department of Electronic and Electrical Engineering, University College London, London, WC1E 7JE, UK.
Jazyk: angličtina
Zdroj: Advanced materials (Deerfield Beach, Fla.) [Adv Mater] 2024 Sep; Vol. 36 (36), pp. e2400270. Date of Electronic Publication: 2024 Jul 22.
DOI: 10.1002/adma.202400270
Abstrakt: Tuning magnetic properties in layered van der Waals (vdW) materials has captured significant attention due to the efficient control of ground states by heterostructuring and external stimuli. Electron doping by electrostatic gating, interfacial charge transfer, and intercalation is particularly effective in manipulating the exchange and spin-orbit properties, resulting in a control of Curie temperature (T C ) and magnetic anisotropy. Here, an uncharted role of intercalation is discovered to generate magnetic frustration. As a model study, Na atoms are intercalated into the vdW gaps of pristine Cr 2 Ge 2 Te 6 (CGT) where generated magnetic frustration leads to emerging spin-glass states coexisting with a ferromagnetic order. A series of dynamic magnetic susceptibility measurements/analysis confirms the formation of magnetic clusters representing slow dynamics with a distribution of relaxation times. The intercalation also modifies other macroscopic physical parameters including the significant enhancement of T C from 66 to 240 K and the switching of magnetic easy-hard axis direction. This study identifies intercalation as a unique route to generate emerging frustrated spin states in simple vdW crystals.
(© 2024 The Author(s). Advanced Materials published by Wiley‐VCH GmbH.)
Databáze: MEDLINE
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