A promising method of evaluating ZnO single crystals using the line-focus-beam ultrasonic material-characterization system

Jun Ichi Kushibiki; Yuji Ohashi; Mototaka Arakawa; Tomoya Tanaka

doi:10.1143/APEX.2.026501

A promising method of evaluating ZnO single crystals using the line-focus-beam ultrasonic material-characterization system

Jun Ichi Kushibiki, Yuji Ohashi, Mototaka Arakawa, Tomoya Tanaka

Research output: Contribution to journal › Article › peer-review

8 Citations (Scopus)

Abstract

Preliminary experiments and numerical calculations were conducted for developing a new ultrasonic method of evaluating resistivity distributions in ZnO single crystals using the line-focus-beam ultrasonic material- characterization system. Velocity and attenuation of leaky surface acoustic waves (LSAWs) were measured at 225MHz on three Z-cut ZnO specimens with different resistivities. We observed drastic LSAW velocity and attenuation changes associated with relaxation between piezoelectricity and semiconduction for LSAW propagation: 56 m/s in velocity and 0.012 in normalized attenuation around a resistivity of 8.3 Ωm. This ultrasonic method is promising for ZnO crystal characterization.

Original language	English
Article number	026501
Journal	Applied Physics Express
Volume	2
Issue number	2
DOIs	https://doi.org/10.1143/APEX.2.026501
Publication status	Published - 2009 Feb 1

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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AB - Preliminary experiments and numerical calculations were conducted for developing a new ultrasonic method of evaluating resistivity distributions in ZnO single crystals using the line-focus-beam ultrasonic material- characterization system. Velocity and attenuation of leaky surface acoustic waves (LSAWs) were measured at 225MHz on three Z-cut ZnO specimens with different resistivities. We observed drastic LSAW velocity and attenuation changes associated with relaxation between piezoelectricity and semiconduction for LSAW propagation: 56 m/s in velocity and 0.012 in normalized attenuation around a resistivity of 8.3 Ωm. This ultrasonic method is promising for ZnO crystal characterization.

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