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To date, more than 20 crystalline and amorphous phases of ice have been reported. This extraordinary polymorphism makes ice unique and has inspired numerous studies in the broad fields of materials science and Earth and planetary science. As a single water molecule (H2O) has an electric dipole moment, ice exhibits a relatively high dielectric constant (about 100). Regardless of the number of ice polymorphs and their high dielectric constants, no clear evidence of the existence of ferroelectric ice (FI) has been reported (there are reports of FI in nano-confined waters). Control of the direction of the H2O dipole moment is an attractive subject in physical chemistry, and I have searched for a hitherto unknown FI phase under high pressure, where many ice polymorphs appear. I have developed three high-pressure cells for my aim. I will talk about the details of the developed cells and the high-pressure behavior of ice, particularly its hydrogen ordering.

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Keyword: 氷の高圧研究

Conference: 29th International Conference on High Pressure Science and Technology (AIRAPT-29) (2025-09-28 - 2025-10-03)

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Manuscript type: Not a journal article

MDR DOI: https://doi.org/10.48505/nims.6064

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Updated at: 2025-12-24 15:36:31 +0900

Published on MDR: 2025-12-25 08:19:46 +0900