NaV2O4: a Quasi-1D Metallic Antiferromagnet with Half-Metallic Chains

Abstract

NaV2O4 crystals were grown under high pressure using a NaCl flux, and the crystals were characterized with X-ray diffraction, electrical resistivity, heat capacity, and magnetization. The structure of NaV2O4 consists of double chains of edge-sharing VO6 octahedra. The resistivity is highly anisotropic, with the resistivity perpendicular to the chains more than 20 times greater than that parallel to the chains. Magnetically, the intrachain interactions are ferromagnetic and the interchain interactions are antiferromagnetic; 3D antiferromagnetic order is established at 140 K. First principles electronic structure calculations indicate that the chains are half metallic. Interestingly, the case of NaV2O4 seems to be a quasi-1D analogue of what was found for half-metallic materials.

14 pages, including 4 figures and 1 table, accepted for publication in PRL

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• Na-ion dynamics in Quasi-1D compound NaV2O4
• Neutron powder diffraction study of NaMn${}_2$O${}_4$ and Li${}_{0.92}$Mn${}_2$O${}_4$: New insights on spin-charge-orbital ordering
• Magnetic, Thermal, and Transport Properties of the Mixed Valent Vanadium Oxides LuV4O8 and YV4O8
• Coexisting Z-type charge and bond order in metallic NaRu${}_2$O${}_4$
• Theoretical Analysis of Electronic and Magnetic Properties of NaV${}_2$O${}_4$: Crucial Role of the Orbital Degrees of Freedom
• Origin of dimensional crossover in quasi-one-dimensional hollandite K${}_2$Ru${}_8$O${}_{16}$