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Highly Stable Cooperative Distortion in a Weak Jahn–Teller d2Cation: Perovskite-Type ScVO3Obtained by High-Pressure and High-Temperature Transformation from Bixbyite
- Source :
- Journal of the American Chemical Society; 20240101, Issue: Preprints
- Publication Year :
- 2024
-
Abstract
- A novel ScVO3perovskite phase has been synthesized at 8 GPa and 1073 K from the cation-disordered bixbyite-type ScVO3. The new perovskite has orthorhombic symmetry at room temperature, space group Pnma, and lattice parameters a= 5.4006(2) Å, b= 7.5011(2) Å, and c= 5.0706(1) Å with Sc3+and V3+ions fully ordered on the A and B sites of the perovskite cell. The vanadium oxygen octahedra [V–O6] display cooperative Jahn–Teller (JT) type distortions, with predominance of the tetragonal Q3over the orthorhombic Q2JT modes. The orthorhombic perovskite shows Arrhenius-type electrical conductivity and undergoes a transition to triclinic symmetry space group P-1 close to 90 K. Below 60 K, the magnetic moments of the 4 nonequivalent vanadium ions undergo magnetic long-range ordering, resulting in a magnetic superstructure of the perovskite cell with propagation vector (0.5, 0, 0.5). The magnetic moments are confined to the xzplane and establish a close to zigzag antiferromagnetic mode.
Details
- Language :
- English
- ISSN :
- 00027863 and 15205126
- Issue :
- Preprints
- Database :
- Supplemental Index
- Journal :
- Journal of the American Chemical Society
- Publication Type :
- Periodical
- Accession number :
- ejs24067904
- Full Text :
- https://doi.org/10.1021/ja109376s