Spin spiral and topological Hall effect in Fe3Ga4
Spin spiral and topological Hall effect in
Fe3Ga4
复制标题
Fe3Ga4 中的自旋螺旋和拓扑霍尔效应
作者：
M. Afshar;I. Mazin
最近提出了一种新的螺旋磁体YMn$_{6}$Sn$_{6} $的拓扑霍尔效应机制，该机制需要由外磁场诱导的横向锥形螺旋（TCS）磁性结合热激螺旋磁振子。原则上，该机构也应适用于其他流动螺旋磁体。本文证明了另一种变磁性化合物Fe$_{3}$Ga$_{4}$在其中一个相中满足这一条件，并且提出的热波动驱动理论与实验结果在数量上是一致的。这一发现表明，这种机制确实是相当普遍的，以前可能在其他化合物中也观察到这种作用，但被忽视了。
A new mechanism for Topological Hall Effect (THE) was recently proposed for the spiral magnet YMn$_{6}$Sn$_{6},$ which requires transverse conical spiral (TCS) magnetism, induced by external magnetic field, combined with thermally excite helical spiral magnons. In principle, this mechanism should be applicable to other itinerant spiral magnets as well. In this paper, we show that another metamagnetic compound, Fe$_{3}$Ga$_{4}$, where THE was observed experimentally before, in one of its phases satisfies this condition, and the proposed theory of thermal-fluctuation driven THE is quantitatively consistent with the experiment. This finding suggests that this mechanism is indeed rather universal, and the effect may have been observed in other compounds before, but overlooked.
影响因子：
--
作者：
Jiadong;Zang;V. Cros;A. Hoffmann
通讯作者：
Jiadong;Zang;V. Cros;A. Hoffmann
影响因子：
4.6
作者：
Wu Y;Ning Z;Cao H;Cao G;Benavides KA;Karna S;McCandless GT;Jin R;Chan JY;Shelton WA;DiTusa JF
通讯作者：
DiTusa JF