F. Yen

collaborators

5 papers

cond-mat.mtrl-sci2024

Electric Polarization and Magnetic Properties of (NH $_{4}$ ) $_{1 - x}$ K $_{x}$ I (x = 0.05-0.17)

Yi Yang Xu, Lei Meng, Miao Miao Zhao +2

While all of the polymorphs of pure NH $_{4}$ I and KI are non-polar, we identify that (NH $_{4}$ ) $_{0.95}$ K $_{0.05}$ I is ferroelectric and (NH $_{4}$ ) $_{0.87}$ K $_{0.13}$ I and (NH $_{4}$ )$_{0.8…

cond-mat.mtrl-sci2024

Magnetic interactions based on proton orbital motion in CH $_{3}$ NH $_{3}$ PbI $_{3}$ and CH $_{3}$ NH $_{3}$ PbBr $_{3}$

Lei Meng, Miao Miao Zhao, Yi Yang Xu +5

The microscopic origin of the remarkable optoelectronic properties of one of the most studied contemporary materials remains unclear. Here, we identify the existence of magnetic in…

cond-mat.mtrl-sci2024

Magnetic Properties of NH $_{4}$ H $_{2}$ PO $_{4}$ and KH $_{2}$ PO $_{4}$ : Emergence of Multiferroic Salts

Lei Meng, Chen He, Wei Ji +1

We observe sharp step-down discontinuities in the magnetic susceptibility of NH $_{4}$ H $_{2}$ PO $_{4}$ and NH $_{4}$ H $_{2}$ PO $_{4}$ - $d$ $_{60}$ (60% deuterated) along the $a$ and $c$ -axes occurrin…

cond-mat.mtrl-sci2024

Magnetoelectric Coupling Based on Protons in Ammonium Sulfate

Lei Meng, Chen He, Fei Yen

Most ferroelectric crystals have their own set of unique characteristics and ammonium sulfate (NH $_{4}$ ) $_{2}$ SO $_{4}$ is no exception. We report on two previously unidentified features…

cond-mat.mtrl-sci2024

Magnetic Ordering of Ammonium Cations in NH $_{4}$ I, NH $_{4}$ Br and NH $_{4}$ Cl

Fei Yen, Lei Meng, Tian Gao +1

The different types of magnetism arise mainly from how electrons move and interact with each other. In this work, we show how protons (H $^{+}$ ) also exhibit magnetic behavior. We mea…

Electric Polarization and Magnetic Properties of (NH4​)1−x​Kx​I (x = 0.05-0.17)

Magnetic interactions based on proton orbital motion in CH3​NH3​PbI3​ and CH3​NH3​PbBr3​

Magnetic Properties of NH4​H2​PO4​ and KH2​PO4​: Emergence of Multiferroic Salts

Magnetoelectric Coupling Based on Protons in Ammonium Sulfate

Magnetic Ordering of Ammonium Cations in NH4​I, NH4​Br and NH4​Cl

Electric Polarization and Magnetic Properties of (NH $_{4}$ ) $_{1 - x}$ K $_{x}$ I (x = 0.05-0.17)

Magnetic interactions based on proton orbital motion in CH $_{3}$ NH $_{3}$ PbI $_{3}$ and CH $_{3}$ NH $_{3}$ PbBr $_{3}$

Magnetic Properties of NH $_{4}$ H $_{2}$ PO $_{4}$ and KH $_{2}$ PO $_{4}$ : Emergence of Multiferroic Salts

Magnetic Ordering of Ammonium Cations in NH $_{4}$ I, NH $_{4}$ Br and NH $_{4}$ Cl