High-pressure and low-temperature behaviour of organic ferroelectric (R)-3-quinuclidinol

Area of Science:

• Solid-state physics
• Materials science
• Crystallography

Background:

• Ferroelectric materials exhibit spontaneous electric polarization.
• (R)-3-quinuclidinol is a chiral molecule with a ferroelectric phase.
• Understanding structural behavior under external stimuli is crucial for device applications.

Purpose of the Study:

• To investigate the structural response of ferroelectric (R)-3-quinuclidinol to high pressure and low temperature.
• To analyze the anisotropy of structural strain.
• To correlate structural deformations with spontaneous polarization and predict piezoelectric responses.

Main Methods:

• X-ray diffraction analysis
• High-pressure cell techniques
• Low-temperature cryostat

Main Results:

• Continuous changes in unit-cell volume and parameters were observed upon cooling and compression.
• Anisotropic structural strain exhibited different behaviors under pressure and cooling.
• Shortest intermolecular hydrogen-hydrogen (H...H) contacts were achieved at high pressures.

Conclusions:

• The distinct anisotropy of structural strain under pressure and cooling implies different piezoelectric properties.
• Deformation along the polarization axis is linked to spontaneous polarization.
• Further research into the piezoelectric response of (R)-3-quinuclidinol under varying conditions is warranted.