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 Ln³⁺ (= 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 3}H₄) indicate the splitting of the ground state J-multiplet due to the crystal-electric field. BaSm₂ZnO₅ (Sm³⁺; 4f^{5 6}H_5/2) is a strong Van Vleck paramagnet, while BaEu₂ZnO₅ is non-magnetic due to the ⁷F₀ ground state (Eu³⁺; 4f^{6 7}F₀). 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.

通过高压和高温条件下的固相反应合成了BaPr ₂ ZnO ₅，BaSm ₂ ZnO ₅和BaEu ₂ ZnO _5-一系列由Shastry-Sutherland晶格构成的4f磁性绝缘体。在周围离子的晶体电场的影响下，每个Ln ³⁺（= Pr，Sm，Eu）的局部4f电子很好地表征了磁行为。BaPr ₂ ZnO ₅（Pr ³⁺ ; 4f ^{2 3} H _4的磁化率和热容测量）表示由于晶体电场导致的基态J多重分裂。BaSm ₂ ZnO ₅（Sm ³⁺ ; 4f ^{5 6} H _5/2）是很强的Van Vleck顺磁体，而BaEu ₂ ZnO ₅由于⁷ F ₀基态（Eu ³⁺ ; 4f ^{6 7} F ₀）。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。