论文标题
y $ _2 $ co $ _3 $的强大反铁磁性
Robust antiferromagnetism in Y$_2$Co$_3$
论文作者
论文摘要
我们报告了一种基于溶液生长的方法，以合成y $ _2 $ co $ _3 $的单晶及其结构和磁性特性。我们发现，y $ _2 $ co $ _3 $ cy在LA2NI3型矫正结构中结晶，带有空间组CMCE（第64号），CO形成扭曲的Kagome lattices。 y $ _2 $ co $ _3 $订单在低于$ t_n $ = 252 k的抗fiferromagnet上。磁化测量表明，这些矩的主要沿B轴沿B轴对齐，并有一些倾斜的证据。带结构的计算表明，铁磁和抗铁磁序列几乎是退化的，与实验结果不一致。在高达1 GPA的压力下的磁化测量结果表明，N/'EEL温度随着-1.69 K/GPA的斜率降低。我们在1.5 k和21 t的磁化测量中观察到磁场诱导的自旋流动过渡，并沿B方向使用磁场。磁化强度未饱和35 t，表明y $ _2 $ co $ _3 $中的防铁磁订单非常强大，这对于这种共同丰富的金属间质量来说是令人惊讶的。
We report on a solution-growth based method to synthesise single crystals of Y$_2$Co$_3$ and on its structural and magnetic properties. We find that Y$_2$Co$_3$ crystallizes in the La2Ni3-type orthorhombic structure with space group Cmce (No. 64), with Co forming distorted kagome lattices. Y$_2$Co$_3$ orders antiferromagnetically below $T_N$ = 252 K. Magnetization measurements reveal that the moments are primarily aligned along the b axis with evidence for some canting. Band-structure calculations indicate that ferromagnetic and antiferromagnetic orders are nearly degenerate, at odds with experimental results. Magnetization measurements under pressure up to 1 GPa reveal that the N/'eel temperature decreases with the slope of -1.69 K/GPa. We observe a field-induced spin-flop transition in the magnetization measurements at 1.5 K and 21 T with magnetic field along the b direction. The magnetization is not saturated up to 35 T, indicating that the antiferromagnetic ordering in Y$_2$Co$_3$ is quite robust, which is surprising for such a Co-rich intermetallic.
