Inducing ferroelectricity in NH$_4$I and NH$_4$Br via partial replacement of protons by deuterons

Miao Miao Zhao; Lei Meng; Yi Yang Xu; Na Du; Fei Yen

doi:10.1021/acs.jpcc.3c05692

paper

Inducing ferroelectricity in NH $_{4}$ I and NH $_{4}$ Br via partial replacement of protons by deuterons

arXiv:2405.15277 · doi:10.1021/acs.jpcc.3c05692

Abstract

While all of the polymorphs of NH $_{4}$ I and NH $_{4}$ Br are non-polar, a reversible electric polarization is established in the ordered $γ$ phases of (NH $_{4}$ ) $_{0.73}$ (ND $_{4}$ ) $_{0.27}$ I and (NH $_{4}$ ) $_{0.84}$ (ND $_{4}$ ) $_{0.16}$ Br (where D is $^{2}$ H) via $d c$ 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.

14 pages, 3 figures

References in corpus (5)

First-order structural transition in the multiferroic perovskite-like formate [(CH3)2NH2][Mn(HCOO)3]
Magnetic Ordering of Ammonium Cations in NH $_{4}$ I, NH $_{4}$ Br and NH $_{4}$ Cl
Magnetoelectric Coupling Based on Protons in Ammonium Sulfate
Magnetic Properties of NH $_{4}$ H $_{2}$ PO $_{4}$ and KH $_{2}$ PO $_{4}$ : Emergence of Multiferroic Salts
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Cited by in corpus (1)

Determining the chemical composition of diamagnetic mixed solids via measurements of the magnetic susceptibility

Inducing ferroelectricity in NH4​I and NH4​Br via partial replacement of protons by deuterons

Abstract

References in corpus (5)

Cited by in corpus (1)

Inducing ferroelectricity in NH $_{4}$ I and NH $_{4}$ Br via partial replacement of protons by deuterons