High-pressure synthesis, crystal structure, and magnetic properties of the Shastry-Sutherland-lattice oxides BaLn2ZnO5 (Ln = Pr, Sm, Eu)
High-pressure synthesis, crystal structure, and magnetic properties of the Shastry-Sutherland-lattice oxides BaLn2ZnO5 (Ln = Pr, Sm, Eu)
复制标题
DOI：
10.1016/j.jssc.2020.121489
复制
发表时间：
2020-09-01
影响因子：
3.3
通讯作者：
Yamaura, Kazunari
中科院分区：
文献类型：
--
作者：
Ishii, Yuto;Chen, Jie;Yamaura, Kazunari
在高温高压条件下，通过固相反应合成了具有Shastry-Sutherland晶格的系列4f磁性绝缘体BaPr2ZnO5、BaSm2ZnO5和BaEu2ZnO5。在周围离子晶体电场的影响下，Ln(3+)(=Pr，Sm，Eu)的局域4f电子很好地表征了其磁性行为。BaPr2ZnO5(Pr3+；4f(2)H-3(4))的磁化率和热容测量表明，由于晶体电场的作用，基态J倍数发生分裂。BaSm_2ZnO_5(Sm~(3+)；4f(5)H~(-6)(5/2))是强Van Vleck顺磁体，而BaEu_2ZnO_5由于F-7(0)基态(Eu~(3+)；4f(6)F~(-7)(0))是非磁性的。这一系列新的氧化物丰富了一组Shastry-Sutherland晶格材料，并有助于开发一系列二维量子材料。
BaPr2ZnO5, BaSm2ZnO5, and BaEu2ZnO5 - a series of 4f magnetic insulators comprising the Shastry-Sutherland lattice - were synthesized via a solid-state reaction under high-pressure and high-temperature conditions. The magnetic behaviors are well characterized by the localized 4f electrons of each Ln(3+) (= Pr, Sm, Eu) under the influence of the crystal-electric field of the surrounding ions. The magnetic susceptibility and heat capacity measurements of BaPr2ZnO5 (Pr3+; 4f(2) H-3(4))indicate the splitting of the ground state J-multiples due to the crystal-electric field. BaSm2ZnO5 (Sm3+; 4f(5) H-6(5/2)) is a strong Van Vleck paramagnet, while BaEu2ZnO5 is non-magnetic due to the F-7(0) ground state (Eu3+; 4f(6) F-7(0)). The series of new oxides enriches a group of the Shastry-Sutherland lattice materials and helps to develop a range of two-dimensional quantum materials.