论文标题
蝴蝶形的磁力固定性三角形抗fiferromagnet ag $ _2 $ cro $ _2 $
Butterfly-shaped magnetoresistance in triangular-lattice antiferromagnet Ag$_2$CrO$_2$
论文作者
论文摘要
使用抗铁磁铁（AFMS）的自旋设备是未来应用的有希望的候选人。最近，基于AFM的设备报道了许多有趣的物理特性。在这里，我们报告了一个微米大小的三角形抗fiferromagnet ag $ _2 $ cro $ _2 $的蝴蝶形磁路（MR）。该材料由二维三角晶格CRO $ _2 $层和反铁磁性耦合$ s $ = 3/2旋转和高电导率的AG $ _2 $层。蝴蝶形的MR仅在磁场垂直于cro $ _2 $平面上施加磁场时才会出现，该平面在磁性订购温度下具有最大MR比率（$ \ $ \ $ 15％）。这些特征与在常规磁性材料中观察到的特征不同。我们提出了一个理论模型，其中部分无序旋转的波动与Ising各向异性的波动在Ag $ _2 $ CRO $ $ _2 $中的蝴蝶形MR中起着至关重要的作用。
Spintronic devices using antiferromagnets (AFMs) are promising candidates for future applications. Recently, many interesting physical properties have been reported with AFM-based devices. Here we report a butterfly-shaped magnetoresistance (MR) in a micrometer-sized triangular-lattice antiferromagnet Ag$_2$CrO$_2$. The material consists of two-dimensional triangular-lattice CrO$_2$ layers with antiferromagnetically coupled $S$ = 3/2 spins and Ag$_2$ layers with high electrical conductivity. The butterfly-shaped MR appears only when the magnetic field is applied perpendicularly to the CrO$_2$ plane with the maximum MR ratio ($\approx$ 15%) at the magnetic ordering temperature. These features are distinct from those observed in conventional magnetic materials. We propose a theoretical model where fluctuations of partially disordered spins with the Ising anisotropy play an essential role in the butterfly-shaped MR in Ag$_2$CrO$_2$.
