Presentation Title

Does Amber Have Piezoelectric Properties?

Faculty Mentor

Timothy Usher

Start Date

18-11-2017 2:15 PM

End Date

18-11-2017 3:15 PM

Location

BSC-Ursa Minor 10

Session

Poster 3

Type of Presentation

Poster

Subject Area

physical_mathematical_sciences

Abstract

Cesium sodium croconate (CSC), a centrosymmetric salt, has been demonstrated to have piezoelectric-like behavior due to twinning. Cesium potassium croconate(CPC), an amber colored salt of croconic acid (AMBER), has a centrosymmetric structure, but may demonstrate twinning properties due to the similar molecular structure to CSC. If it had twinning similar to CSC, CPC would have a greater possibility of having piezoelectric-like behavior. This study investigates CPC for its ferroelectric and piezoelectric behavior. If a crystal is ferroelectric, it must be polar (not centrosymmetric), and when an appropriately oriented electric field is applied, the polarity can be reversed. Piezoelectric materials must also be non-centrosymmetric, and change shape when an electric field is applied. All ferroelectric materials are also piezoelectric but if a crystal is piezoelectric it may or may not be ferroelectric. Several experimental methods were used in the research: Atomic force microscope(AFM), Piezo force microscopy (PFM), electron paramagnetic resonance (EPR), and ripple test. Slow grown crystals were carefully selected based on appearance and thickness, coated on to two sides of the crystal with silver paint as a conductor, and a voltage was applied. We also used an AFM to illustrate the topography and polarity of the crystal. We used PFM to look for a piezomagnetic response. Our data appeared to give a piezoelectric response for CPC, but it was unclear if the response was an artifact. Based on the data presented, it appears that CPC does not have twin-induced polarity and thus does not appear to be piezoelectric or ferroelectric.

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Nov 18th, 2:15 PM Nov 18th, 3:15 PM

Does Amber Have Piezoelectric Properties?

BSC-Ursa Minor 10

Cesium sodium croconate (CSC), a centrosymmetric salt, has been demonstrated to have piezoelectric-like behavior due to twinning. Cesium potassium croconate(CPC), an amber colored salt of croconic acid (AMBER), has a centrosymmetric structure, but may demonstrate twinning properties due to the similar molecular structure to CSC. If it had twinning similar to CSC, CPC would have a greater possibility of having piezoelectric-like behavior. This study investigates CPC for its ferroelectric and piezoelectric behavior. If a crystal is ferroelectric, it must be polar (not centrosymmetric), and when an appropriately oriented electric field is applied, the polarity can be reversed. Piezoelectric materials must also be non-centrosymmetric, and change shape when an electric field is applied. All ferroelectric materials are also piezoelectric but if a crystal is piezoelectric it may or may not be ferroelectric. Several experimental methods were used in the research: Atomic force microscope(AFM), Piezo force microscopy (PFM), electron paramagnetic resonance (EPR), and ripple test. Slow grown crystals were carefully selected based on appearance and thickness, coated on to two sides of the crystal with silver paint as a conductor, and a voltage was applied. We also used an AFM to illustrate the topography and polarity of the crystal. We used PFM to look for a piezomagnetic response. Our data appeared to give a piezoelectric response for CPC, but it was unclear if the response was an artifact. Based on the data presented, it appears that CPC does not have twin-induced polarity and thus does not appear to be piezoelectric or ferroelectric.