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Emergent Intrinsic Ferromagnetism in Two-Dimensional Trigonal Rhodium Oxide
Zhenglong Fan1, Yixin Liu2, Xinyuan Wei3
1Institute of Functional Nano and Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, Jiangsu, China.
Nano Letters
|October 13, 2023
Summary
Researchers synthesized large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO2), a novel 2D material with intrinsic ferromagnetism. This discovery advances 2D spintronics by providing a promising ferromagnetic oxide crystal.
Area of Science:
- Materials Science
- Condensed Matter Physics
- Nanotechnology
Background:
- Two-dimensional (2D) van der Waals single crystals with long-range magnetic order are crucial for advancing 2D spintronics.
- The development of 2D single-crystal metal oxides with intrinsic ferromagnetic properties presents a significant scientific challenge, unlike established materials like graphene and transition metal dichalcogenides.
Purpose of the Study:
- To report the synthesis of a large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO2).
- To investigate the intrinsic ferromagnetic properties of this novel 2D material.
- To elucidate the origin of ferromagnetism in SC-Tri-RhO2 through theoretical calculations.
Main Methods:
- Synthesis of large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO2).
- Characterization of crystal structure, including lattice parameters (a = b = 3.074 Å, c = 6.116 Å) and space group (P3̅m1 (164)).
- Experimental and theoretical investigations of magnetic properties, including ferromagnetism (FM) and magnetic moment contribution.
Main Results:
- Successful synthesis of large-size trigonal single-crystal rhodium oxide (SC-Tri-RhO2).
- Observation of strong ferromagnetism (FM) in SC-Tri-RhO2 at a relatively high temperature.
- Theoretical calculations indicate ferromagnetism arises from spin splitting near the Fermi level, with the Rh atom being the primary contributor to the total magnetic moment.
Conclusions:
- SC-Tri-RhO2 is a promising 2D material with intrinsic ferromagnetism, suitable for spintronic applications.
- The study provides a new avenue for exploring ferromagnetic 2D metal oxides.
- Understanding the magnetic properties of SC-Tri-RhO2 paves the way for future spintronic device development.
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