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Layered La2MSb2O9 (M = Co, Ni, and Cu): Synthesis, Crystal Structure, Magnetism, and Optical Properties
Anna V Egorysheva1, Olga G Ellert1, Svetlana V Golodukhina1
1Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow119991, Russia.
Inorganic Chemistry
|July 16, 2026
Summary
New layered triclinic antimonates, La2MSb2O9 (M=Co, Ni, Cu), were synthesized. Magnetic studies reveal antiferromagnetic coupling in chains for cobalt and nickel compounds, with weak ferromagnetism and metamagnetic behavior in La2CoSb2O9.
Area of Science:
- Solid-state chemistry
- Materials science
- Crystallography
Background:
- Layered antimonates are an emerging class of materials with potential applications.
- Understanding the structure-property relationships in these compounds is crucial for materials design.
Purpose of the Study:
- To synthesize and characterize novel layered antimonate single crystals of La2MSb2O9 (M = Co, Ni, Cu).
- To investigate the crystal structure, electronic transitions, and magnetic properties of these compounds.
Main Methods:
- Single crystals were grown using the molten salt synthesis method.
- Crystal structures were determined using X-ray diffraction.
- Absorption spectra and magnetic properties were measured.
Main Results:
- La2MSb2O9 compounds crystallize in layered triclinic structures (space group P1̅).
- La2CoSb2O9 and La2NiSb2O9 are isostructural, while La2CuSb2O9 exhibits distinct structural features.
- Magnetic studies showed antiferromagnetic coupling in 1D chains for M=Co and Ni, with transitions at 15 K and 26 K, respectively.
- Weak ferromagnetism and metamagnetic behavior were observed in La2CoSb2O9.
Conclusions:
- The study presents the first detailed structural and magnetic characterization of La2MSb2O9 single crystals.
- The findings highlight the influence of the transition metal (M) on the crystal structure and magnetic behavior.
- These compounds represent promising candidates for exploring complex magnetic phenomena in layered materials.
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