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- W4381586919 abstract "The van der Waals (vdW) type-II multiferroic NiI$_2$ has emerged as a candidate for exploring non-collinear magnetism and magnetoelectric effects in the 2D limit. Frustrated intralayer exchange interactions on a triangular lattice result in a helimagnetic ground state, with spin-induced improper ferroelectricity stabilized by the interlayer interactions. Here we investigate the magnetic and structural phase transitions in bulk NiI$_2$, using high-pressure Raman spectroscopy, optical linear dichroism, and x-ray diffraction. We obtain evidence for a significant pressure enhancement of the antiferromagnetic and helimagnetic transition temperatures, at rates of $sim15.3/14.4$ K/GPa, respectively. These enhancements are attributed to a cooperative effect of pressure-enhanced interlayer and third-nearest-neighbor intralayer exchange. These results reveal a general path for obtaining high-temperature type-II multiferroicity via high pressures in vdW materials." @default.
- W4381586919 created "2023-06-22" @default.
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- W4381586919 date "2023-06-20" @default.
- W4381586919 modified "2023-10-18" @default.
- W4381586919 title "Signatures of pressure-enhanced helimagnetic order in van der Waals multiferroic NiI$_2$" @default.
- W4381586919 doi "https://doi.org/10.48550/arxiv.2306.11720" @default.
- W4381586919 hasPublicationYear "2023" @default.
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