论文标题
Van der Waals Crystals中的可调磁性属性（Fe $ _ {1-X} $ CO $ _X $）$ _ 5 $ gete $ _2 $
Tunable magnetic properties in van der Waals crystals (Fe$_{1-x}$Co$_x$)$_5$GeTe$_2$
论文作者
论文摘要
我们报告钴对范德华（VDW）磁铁Fe $ _5 $ gete $ _2 $的掺杂效果。一系列（fe $ _ {1-x} $ co $ _x $）$ _ 5 $ gete $ _2 $（0 $ \ leq $ x $ x $ \ leq $ 0.44）单晶已成功地种植，其结构，磁性和运输属性已被研究。对于X = 0.20，Curie温度$ T_C $从276〜K增加到337〜K。此外，磁性容易轴重新定位了$ c $ - 轴的$ c $轴，该$ c $轴是未息的fe $ _5 $ gete $ _2 $，并具有很大的增强的磁动率。这些磁性属性将产生（fe $ _ {0.8} $ co $ _ {0.2} $）$ _ 5 $ gete $ _2 $在二维限制中稳定磁性方案更有效。在较高的掺杂侧确定了复杂的磁相图。 X = 0.44 Crystal首先在$ t_c $ = 363〜K上订购Ferromagnet，然后在$ t_n $ = 335〜K处进行反铁磁过渡。此外，在AFM基态下观察到磁场诱导的自旋流动转变。我们的工作揭示了（fe $ _ {1-x} $ co $ _x $）$ _ 5 $ gete $ _2 $作为有前途的候选人，用于开发新的自旋相关应用程序，并提出了一种方法来设计VDW磁铁的磁性属性。
We report the doping effects of cobalt on van der Waals (vdW) magnet Fe$_5$GeTe$_2$. A series of (Fe$_{1-x}$Co$_x$)$_5$GeTe$_2$ (0$\leq$x$\leq$0.44) single crystals have been successfully grown, their structural, magnetic and transport properties are investigated. For x=0.20, The Curie temperature $T_C$ increases from 276~K to 337~K. Moreover, the magnetic easy-axis is reoriented to the $ab$-plane from the $c$-axis in undoped Fe$_5$GeTe$_2$ with largely enhanced magnetic anisotropy. These magnetic properties would make (Fe$_{0.8}$Co$_{0.2}$)$_5$GeTe$_2$ more effective in stabilizing magnetic order in the two-dimensional limit. A complex magnetic phase diagram is identified on the higher doping side. The x=0.44 crystal first orders ferromagnetically at $T_C$=363~K then undergoes an antiferromagnetic transition at $T_N$=335~K. Furthermore magnetic-field-induced spin-flop transitions are observed for the AFM ground state. Our work reveals (Fe$_{1-x}$Co$_x$)$_5$GeTe$_2$ as promising candidates for developing new spin-related applications and proposes a method to engineer the magnetic properties of vdW magnet.
