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Bilayer orthogonal ferromagnetism in CrTe2-based van der Waals system

Bigi, Chiara ; Jego, Cyriack ; Polewczyk, Vincent ; De Vita, Alessandro ; Jaouen, Thomas ; Tchouekem, Hulerich C. ; Bertran, François ; Le Fèvre, Patrick ; Turban, Pascal and Jacquot, Jean François , et al. (2025) In Nature Communications 16(1).
Abstract

Systems with pronounced spin anisotropy are pivotal in advancing magnetization switching and spin-wave generation mechanisms that are fundamental to spintronic technologies. Quasi-van der Waals ferromagnets like Cr1+δTe2 represent seminal materials in this field, renowned for their delicate balance between frustrated layered geometries and magnetism. Despite extensive investigation, the nature of their magnetic ground state and the mechanism of spin reorientation under external fields and varying temperatures remain contested. Here, we exploit complementary techniques to reveal a previously overlooked magnetic phase in Cr1+δTe2 (δ = 0.25 − 0.50), which we term orthogonal-ferromagnetism. This... (More)

Systems with pronounced spin anisotropy are pivotal in advancing magnetization switching and spin-wave generation mechanisms that are fundamental to spintronic technologies. Quasi-van der Waals ferromagnets like Cr1+δTe2 represent seminal materials in this field, renowned for their delicate balance between frustrated layered geometries and magnetism. Despite extensive investigation, the nature of their magnetic ground state and the mechanism of spin reorientation under external fields and varying temperatures remain contested. Here, we exploit complementary techniques to reveal a previously overlooked magnetic phase in Cr1+δTe2 (δ = 0.25 − 0.50), which we term orthogonal-ferromagnetism. This phase consists of atomically sharp single layers of in-plane and out-of-plane maximally canted ferromagnetic blocks, which differs from the stacking of multiple heterostructural elements required for crossed magnetism. Contrary to earlier reports of gradual spin reorientation in CrTe2-based systems, we present evidence for abrupt spin-flop-like transitions. This discovery further highlights Cr1+δTe2 compounds as promising candidates for spintronic and orbitronic applications, opening new pathways for device engineering.

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organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Nature Communications
volume
16
issue
1
article number
4495
publisher
Nature Publishing Group
external identifiers
  • scopus:105005474343
  • pmid:40368910
ISSN
2041-1723
DOI
10.1038/s41467-025-59266-4
language
English
LU publication?
yes
id
40891341-113a-4a80-8fb8-538fb14c6ca2
date added to LUP
2025-08-05 11:16:36
date last changed
2025-09-02 13:43:06
@article{40891341-113a-4a80-8fb8-538fb14c6ca2,
  abstract     = {{<p>Systems with pronounced spin anisotropy are pivotal in advancing magnetization switching and spin-wave generation mechanisms that are fundamental to spintronic technologies. Quasi-van der Waals ferromagnets like Cr<sub>1+δ</sub>Te<sub>2</sub> represent seminal materials in this field, renowned for their delicate balance between frustrated layered geometries and magnetism. Despite extensive investigation, the nature of their magnetic ground state and the mechanism of spin reorientation under external fields and varying temperatures remain contested. Here, we exploit complementary techniques to reveal a previously overlooked magnetic phase in Cr<sub>1+δ</sub>Te<sub>2</sub> (δ = 0.25 − 0.50), which we term orthogonal-ferromagnetism. This phase consists of atomically sharp single layers of in-plane and out-of-plane maximally canted ferromagnetic blocks, which differs from the stacking of multiple heterostructural elements required for crossed magnetism. Contrary to earlier reports of gradual spin reorientation in CrTe<sub>2</sub>-based systems, we present evidence for abrupt spin-flop-like transitions. This discovery further highlights Cr<sub>1+δ</sub>Te<sub>2</sub> compounds as promising candidates for spintronic and orbitronic applications, opening new pathways for device engineering.</p>}},
  author       = {{Bigi, Chiara and Jego, Cyriack and Polewczyk, Vincent and De Vita, Alessandro and Jaouen, Thomas and Tchouekem, Hulerich C. and Bertran, François and Le Fèvre, Patrick and Turban, Pascal and Jacquot, Jean François and Miwa, Jill A. and Clark, Oliver J. and Jana, Anupam and Chaluvadi, Sandeep Kumar and Orgiani, Pasquale and Cuoco, Mario and Leandersson, Mats and Balasubramanian, Thiagarajan and Olsen, Thomas and Hwang, Younghun and Jamet, Matthieu and Mazzola, Federico}},
  issn         = {{2041-1723}},
  language     = {{eng}},
  number       = {{1}},
  publisher    = {{Nature Publishing Group}},
  series       = {{Nature Communications}},
  title        = {{Bilayer orthogonal ferromagnetism in CrTe<sub>2</sub>-based van der Waals system}},
  url          = {{http://dx.doi.org/10.1038/s41467-025-59266-4}},
  doi          = {{10.1038/s41467-025-59266-4}},
  volume       = {{16}},
  year         = {{2025}},
}