Compositional nanodomain formation in hybrid formate perovskites

Abstract

We report the synthesis and structural characterisation of three mixed-metal formate perovskite families [C(NH${}_2$)${}_3$]M${}_{1-x}$Cu${}_x$(HCOO)${}_3$ (M = Mn, Zn, Mg). Using a combination of infrared spectroscopy, non-negative matrix factorization, and reverse Monte Carlo refinement, we show that the Mn- and Zn-containing compounds support compositional nanodomains resembling the polar nanoregions of conventional relaxor ferroelectrics. The M = Mg family exhibits a miscibility gap that we suggest reflects the limiting behaviour of nanodomain formation.

arXiv comment4 pages, 3 figures

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