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Percolation-Induced Ferrimagnetism from Vacancy Order in [Gua]Mn1-Fe2(HCOO)3 Hybrid Perovskites
Johnathan M Bulled1, Alexandra Willis1, Zoé Faure Beaulieu1
1Department of Chemistry, University of Oxford, Inorganic Chemistry Laboratory, Oxford OX1 3QR, United Kingdom.
Abstract:
We report the magnetic behavior of the hybrid perovskites [Gua]Mn1-Fe2□(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.
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