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】

Free