The effect of vanadium substitution on the structural and magnetic properties of (Fe 1−x V x ) 3 Ga 4
The effect of vanadium substitution on the structural and magnetic properties of (Fe 1−x V x ) 3 Ga 4
复制标题
钒替代对(Fe 1−x V x ) 3 Ga 4 结构和磁性能的影响
DOI：
10.1016/j.jmmm.2022.169964
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发表时间：
2022
影响因子：
2.7
通讯作者：
Jamer, Michelle E.
中科院分区：
文献类型：
--
作者：
Wilfong, Brandon;Sharma, Vaibhav;Bishop, Omar;Fedorko, Adrian;Heiman, Don;Barua, Radhika;Jamer, Michelle E.
Fe 3Ga 4显示了一个复杂的磁相图，它对电子和晶体结构的变化都很敏感，并且可以调节。为了探索这种可调谐性，已经合成并表征了掺钒的（Fe 1− x Vx）3 Ga 4。高分辨率同步辐射X射线衍射和Rietveld精修表明，高达20%的V掺杂的样品保持同构的Fe 3 Ga 4和显示的线性增加，随着掺杂的增加，晶胞体积。磁性测量揭示了抑制的反铁磁螺旋自旋密度波（SDW）与V掺杂，揭示了在低温铁磁-反铁磁（FM-AFM）转变（T1）和高温AFM-FM转变（T2）的变化。在7.5%的V掺杂，变磁性行为的螺旋AFM SDW相不再观察到。这些结果提供了一个途径，以有效地调整的磁性秩序在Fe 3Ga 4的设备，以及增加理解的磁性在这个系统。
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–antiferromagnetic (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.