Magnetic structure of the zigzag chain family NaxCa1-xV2O4 determined by muon- spin rotation | |
Article | |
关键词: HIGH-PRESSURE SYNTHESIS; TRANSITION; | |
DOI : 10.1103/PhysRevB.82.094410 | |
来源: SCIE |
【 摘 要 】
We present muon-spin-rotation measurements on polycrystalline samples of the complete family of the antiferromagnetic (AF) zigzag chain compounds, NaxCa1-xV2O4. In this family, we explore the magnetic properties from the metallic NaV2O4 to the insulating CaV2O4. We find a critical x(c)(similar to 0.833) which separates the low and high Na-concentration-dependent transition temperature and its magnetic ground state. In the x < x(c) compounds, the magnetic ordered phase is characterized by a single homogenous phase and the formation of incommensurate spin-density-wave order. Whereas in the x > x(c) compounds, multiple subphases appear with temperature and x. Based on the muon data obtained in zero external magnetic field, a careful dipolar field simulation was able to reproduce the muon behavior and indicates a modulated helical incommensurate spin structure of the metallic AF phase. The incommensurate modulation period obtained by the simulation agrees with that determined by neutron diffraction.
【 授权许可】
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