Inducing Ferroelectricity in NH4I and NH4Br via Partial Replacement of Protons by Deuterons,The Journal of Physical Chemistry C

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Inducing Ferroelectricity in NH4I and NH4Br via Partial Replacement of Protons by Deuterons
The Journal of Physical Chemistry C ( IF 3.3 ) Pub Date : 2023-10-11 , DOI: 10.1021/acs.jpcc.3c05692
Miao Miao Zhao ₁ , Lei Meng ₁ , Yi Yang Xu ₁ , Na Du ₁ , Fei Yen ₁

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While all of the polymorphs of NH₄I and NH₄Br are nonpolar, a reversible electric polarization is established in the ordered γ phases of (NH₄)_0.73(ND₄)_0.27I and (NH₄)_0.84(ND₄)_0.16Br (where D is ²H) via dc electric fields. The presence of two groups of orbital magnetic moments appears to be responsible for the asymmetric lattice distortions. Our findings provide an alternative pathway for hydrogen-based materials to potentially add a ferroelectric functionality.

中文翻译：

通过氘核部分取代质子在 NH4I 和 NH4Br 中诱导铁电

_{虽然NH 4} I和NH ₄ Br的所有多晶型物都是非极性的，但在(NH ₄ ) _0.73 (ND ₄ ) _0.27 I和(NH ₄ ) _0.84 (ND ₄ ) _0.16的有序γ相中建立了可逆电极化Br（其中 D 为² H）通过直流电场。两组轨道磁矩的存在似乎是造成不对称晶格畸变的原因。我们的研究结果为氢基材料提供了一条可能添加铁电功能的替代途径。

更新日期：2023-10-11

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