Large‐Area Synthesis of Ferromagnetic Fe 5− x GeTe 2 /Graphene van der Waals Heterostructures with Curie Temperature above Room Temperature
Large‐Area Synthesis of Ferromagnetic Fe 5− x GeTe 2 /Graphene van der Waals Heterostructures with Curie Temperature above Room Temperature
Van der Waals (vdW) heterostructures combining layered ferromagnets and other 2D crystals are promising building blocks for the realization of ultracompact devices with integrated magnetic, electronic, and optical functionalities. Their implementation in various technologies depends strongly on the...
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Personal Name(s): | Lv, Hua (Corresponding author) |
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da Silva, Alessandra / Figueroa, Adriana I. / Guillemard, Charles / Aguirre, Iván Fernández / Camosi, Lorenzo / Aballe, Lucia / Valvidares, Manuel / Valenzuela, Sergio O. / Schubert, Jürgen / Schmidbauer, Martin / Herfort, Jens / Hanke, Michael / Trampert, Achim / Engel-Herbert, Roman / Ramsteiner, Manfred / Lopes, Joao Marcelo J. | |
Contributing Institute: |
Gehirn & Verhalten; INM-7 Halbleiter-Nanoelektronik; PGI-9 |
Published in: | Small, 19 (2023) 39, S. 2302387 |
Imprint: |
Weinheim
Wiley-VCH
2023
|
DOI: |
10.1002/smll.202302387 |
DOI: |
10.34734/FZJ-2024-02507 |
Document Type: |
Journal Article |
Research Program: |
Neuroscientific Data Analytics and AI |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.34734/FZJ-2024-02507 in citations.
Van der Waals (vdW) heterostructures combining layered ferromagnets and other 2D crystals are promising building blocks for the realization of ultracompact devices with integrated magnetic, electronic, and optical functionalities. Their implementation in various technologies depends strongly on the development of a bottom-up scalable synthesis approach allowing for realizing highly uniform heterostructures with well-defined interfaces between different 2D-layered materials. It is also required that each material component of the heterostructure remains functional, which ideally includes ferromagnetic order above room temperature for 2D ferromagnets. Here, it is demonstrated that the large-area growth of Fe5−xGeTe2/graphene heterostructures is achieved by vdW epitaxy of Fe5−xGeTe2 on epitaxial graphene. Structural characterization confirms the realization of a continuous vdW heterostructure film with a sharp interface between Fe5−xGeTe2 and graphene. Magnetic and transport studies reveal that the ferromagnetic order persists well above 300 K with a perpendicular magnetic anisotropy. In addition, epitaxial graphene on SiC(0001) continues to exhibit a high electronic quality. These results represent an important advance beyond nonscalable flake exfoliation and stacking methods, thus marking a crucial step toward the implementation of ferromagnetic 2D materials in practical applications. |