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arXiv 1709.00952cond-mat.mtrl-sci
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混合甲酸钙钛矿中的组成纳米畴形成

Compositional nanodomain formation in hybrid formate perovskites

Edwina A. Donlan, Hanna L. B. Boström, Harry S. Geddes, Emily M. Reynolds, Andrew L. Goodwin

摘要:

本文报道了三种混合金属甲酸盐钙钛矿族化合物[C(NHPDMATHABMM)$_3$ ]M $_{1-x}$ Cu $_x$(HCOO)$_3$(M = Mn,Zn,Mg)的合成和结构表征。使用红外光谱,非负矩阵分解,和反向蒙特卡罗细化的组合,我们表明,含Mn和Zn的化合物支持组成的纳米畴类似于传统的弛豫铁电体的极性纳米区域。M = Mg家族表现出混溶性间隙,我们认为这反映了纳米畴形成的限制行为。

英文摘要:

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.

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