论文标题
钒替代对（fe $ _ {1-x} $ v $ _ {x} $）$ _ {3} $ ga $ _ {4} $的结构和磁性属性的影响
The effect of vanadium substitution on the structural and magnetic properties of (Fe$_{1-x}$V$_{x}$)$_{3}$Ga$_{4}$
论文作者
论文摘要
fe $ _ {3} $ ga $ _ {4} $显示一个复杂的磁相图，该图具有敏感且可调节的，并且具有电子和晶体结构的变化。为了探索这种可调节性，钒掺杂（fe $ _ {1-x} $ v $ _ {x} $）$ _ {3} $ ga $ _ {4} $已合成和表征。高分辨率同步加速器X射线衍射和Rietveld改进表明，最高20 \％v掺杂的样品仍然是等速结构到fe $ _ {3} $ _ {3} $ ga $ _ {4} $，并显示随着掺杂的增加，单位单元量的线性增加。磁性测量结果揭示了抗铁磁性螺旋旋转密度波（SDW）的抑制作用，并通过V掺杂，这两种变化都在低复位的铁磁 - 磁性抗铁流（FM-AFM）过渡（t $ _ {1} $）和高位afm-fmperature（t $ _ {1} $）和高位afm-fm-fm-fm-fm-fm-fmitiention（T $ _________________2 $ __________________2）中揭示。在7.5 \％v掺杂时，不再观察到螺旋AFM SDW相的元磁行为。这些结果为设备的有效调整Fe $ _ {3} $ ga $ _ {4} $的有效调整提供了一种途径，并增加对该系统中磁性的理解。
Fe$_{3}$Ga$_{4}$ displays a complex magnetic phase diagram that is sensitive and tunable with both electronic and crystallographic structure changes. In order to explore this tunability, vanadium-doped (Fe$_{1-x}$V$_{x}$)$_{3}$Ga$_{4}$ has been synthesized and characterized. High-resolution synchrotron X-ray diffraction and Rietveld refinement show that samples up to 20\% V-doping remain isostructural to Fe$_{3}$Ga$_{4}$ and display a linear increase in unit cell volume as doping is increased. Magnetic measurements reveal a suppression of the antiferromagnetic helical spin-density wave (SDW) with V-doping, revealed by changes in both the low-temperature ferromagnetic-antiferromagentic (FM-AFM) transition (T$_{1}$) and high-temperature AFM-FM transition (T$_{2}$). At 7.5\% V-doping, the metamagnetic behavior of the helical AFM SDW phase is no longer observed. These results offer an avenue to effective tuning of the magnetic order in Fe$_{3}$Ga$_{4}$ for devices, as well as increased understanding of the magnetism in this system.
