Vasiliev A N, Berdonosov P S, Kozlyakova E S, Maximova O V, Murtazoev A F, Dolgikh V A, Lyssenko K A, Pchelkina Z V, Gorbunov D I, Chung S H, Koo H-J, Whangbo M-H
Lomonosov Moscow State University, Moscow 119991, Russia.
National University of Science and Technology "MISiS", Moscow 119049, Russia.
Dalton Trans. 2022 Oct 11;51(39):15017-15021. doi: 10.1039/d2dt02316d.
A mixed-valence compound PbCuO(SeO)Cl has a complex structure consisting of one nonmagnetic Cu ( = 0) ion and four nonequivalent magnetic Cu ( = 1/2) ions. It exhibits antiferromagnetic ordering at = 10.2 K. At a temperature below , a sequence of spin-flop transition at = 1.3 T and 1/3 plateau formation at = 4.4 K is observed in the magnetization curve (). The 1/3 magnetization plateau persists at least up to 53.5 T. The spin exchanges of PbCuO(SeO)Cl evaluated by performing energy-mapping analysis based on DFT+U calculations show that the magnetic properties of PbCuO(SeO)Cl are described by the (Cu) cluster of corner-sharing (Cu) tetrahedra, and that each (Cu) cluster has a = 3/2 spin arrangement in the ground state. The 1/3 magnetization plateau observed for PbCuO(SeO)Cl is explained by the field-induced flip of every second (Cu) cluster within a unit cell.
一种混合价化合物PbCuO(SeO)Cl具有复杂结构，由一个非磁性Cu( = 0)离子和四个不等价磁性Cu( = 1/2)离子组成。它在 = 10.2 K时表现出反铁磁有序。在低于该温度时，在磁化曲线()中观察到在 = 1.3 T时的一系列自旋翻转转变以及在 = 4.4 K时的1/3平台形成。1/3磁化平台至少持续到53.5 T。通过基于DFT+U计算进行能量映射分析评估的PbCuO(SeO)Cl的自旋交换表明，PbCuO(SeO)Cl的磁性由角共享(Cu)四面体的(Cu)簇描述，并且每个(Cu)簇在基态具有 = 3/2自旋排列。PbCuO(SeO)Cl观察到的1/3磁化平台是由晶胞内每隔一个(Cu)簇的场诱导翻转来解释的。
