Piezoelectric properties of layered perovskite A2Ti2O7 (A=La and Nd) single-crystal fibers

Abstract
Lanthanum and neodymium titanate A2Ti2O7 (A=La, Nd) single‐crystal fibers were grown via the laser‐heated pedestal growth technique. The single‐crystal fibers were 600 μm in diameter and 3–4 cm in length. The piezoelectric, k23 and d23, and elastic compliance, s33, coefficients were measured using the standard resonance‐antiresonance technique. From a comparison of the measured coefficients to poled single crystal data in the literature, it is concluded that the La2Ti2O7 single‐crystal fiber grew in a single domain state.

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