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Updated: Jul 2, 2026

A Fabrication and Measurement Method for a Flexible Ferroelectric Element Based on Van Der Waals Heteroepitaxy
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Electronic micropositioning with ferroelastic-ferroelectrics.

R A Lemons1, L A Coldren

  • 1Bell Laboratories, Holmdel, NJ 07733, USA.

The Review of Scientific Instruments
|December 1, 1978
PubMed
Summary
This summary is machine-generated.

Beta-gadolinium molybdate crystals offer precise micropositioning by leveraging domain wall motion. Their shape changes provide significantly greater displacement than piezoelectric elements for electronic control applications.

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Area of Science:

  • Materials Science
  • Condensed Matter Physics
  • Crystallography

Background:

  • Ferroelastic and ferroelectric properties are coupled in certain crystalline materials.
  • Domain wall motion influences the macroscopic shape of these crystals.
  • Existing micropositioning technologies, like piezoelectric elements, have limitations in displacement.

Purpose of the Study:

  • To explore the potential of coupled ferroelastic-ferroelectric crystals for micropositioning.
  • To quantify the displacement capabilities of beta-gadolinium molybdate.
  • To compare the performance of these crystals with piezoelectric actuators.

Main Methods:

  • Investigated domain wall motion in beta-gadolinium molybdate crystals.
  • Analyzed the accompanying changes in crystal shape.
  • Measured the displacement generated by domain wall motion.
  • Compared the observed displacement with that of piezoelectric elements.

Main Results:

  • Domain wall motion in beta-gadolinium molybdate induces significant changes in crystal shape.
  • The displacement achieved is 10 to 100 times greater than piezoelectric elements of comparable size.
  • This phenomenon allows for precise micropositioning under electronic control.

Conclusions:

  • Coupled ferroelastic-ferroelectric crystals, specifically beta-gadolinium molybdate, are highly effective for micropositioning applications.
  • The substantial displacement achievable offers a significant advantage over conventional piezoelectric actuators.
  • Electronic control of domain wall motion presents a promising avenue for advanced positioning technologies.