论文标题
YBMN中的复杂磁性订单$ _2 $ SB $ _2 $单晶由$μ$ sr观察到
Complex magnetic order in YbMn$_2$Sb$_2$ single crystals observed by $μ$SR
论文作者
论文摘要
据报道，磁性沮丧的YBMN $ _2 $ SB $ _2 $单晶的晶体生长以及结构，传输和磁性。晶体显示三角形对称性（空间群$ p \ bar {3} m1 $），其中MNSB的波纹蜂窝层被YB原子分开。未观察到结构相变至22〜k。电阻率测量值主要显示出绝缘行为。由于Mn $^{+2} $ lattice Antifice Antifermagnetic Ordinging，组合电阻率，直流易感性和热容量测量确认在230〜K，116〜K和27〜K处的连续过渡是$ T_N $ = 116〜K的过渡。 MUON自旋旋转实验（$μ$ SR）揭示了一个更复杂的情况，磁体积分数的温度依赖性反映了短范围和远距离磁性，以及强烈的磁接地状态。观察到复杂的磁性行为的可能原因，讨论了自旋晶格耦合的作用及其与MN矩之间的交换相互作用的关系。
The crystal growth and the structural, transport and magnetic properties of the magnetically frustrated YbMn$_2$Sb$_2$ single crystals are reported. The crystals show a trigonal symmetry (space group $P\bar{3}m1$), where corrugated honeycomb layers of MnSb are separated by Yb atoms. No structural phase transition was observed down to 22~K. The resistivity measurements show a predominantly insulating behavior. The combined resistivity, dc susceptibility and heat capacity measurements confirm successive transitions at 230~K, 116~K and 27~K, being the transition at $T_N$=116~K due to the Mn$^{+2}$ lattice antiferromagnetic ordering. Muon spin rotation experiments ($μ$SR) reveal a more complicated scenario, with temperature dependence of the magnetic volume fraction reflecting short range and long range magnetic order, and a strongly disordered magnetic ground state. The role of spin-lattice coupling and its relationship with exchange interactions between Mn moments are discussed as possible cause of the complex magnetic behavior observed.
