We report the magnetic behavior of the hybrid perovskites [Gua]Mn_1–xFe_2x/3□_x/3(HCOO)₃ (0 ≤ x ≤ 0.88), showing that vacancy ordering drives bulk ferrimagnetism for x > 0.6. The behavior is rationalized in terms of a simple microscopic model of percolation-induced ferrimagnetism. Monte Carlo simulations driven by this model reproduce the experimental dependence of magnetic susceptibility on x and show that, at intermediate compositions, domains of short-range vacancy order lead to the emergence of local magnetization. Our results open up a new avenue for the design of multiferroic hybrid perovskites.

中文翻译：

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[Gua]Mn1–xFe2x/3(HCOO)3 杂化钙钛矿中空位序的渗流诱导亚铁磁性


我们报道了杂化钙钛矿 [Gua]Mn _1–x Fe _2x/3 □ _x/3 (HCOO) ₃ (0 ≤ x ≤ 0.88)，表明当 x > 0.6 时，空位排序驱动体亚铁磁性。该行为通过渗流引起的亚铁磁性的简单微观模型得以合理化。由该模型驱动的蒙特卡罗模拟重现了磁化率对 x 的实验依赖性，并表明，在中间成分下，短程空位序域导致局部磁化的出现。我们的结果为多铁杂化钙钛矿的设计开辟了一条新途径。