Ultrasonic Microspectroscopy of ZnO Single Crystals Grown by the Hydrothermal Method

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概要

• 論文の詳細を見る

• A new set of acoustical physical constants for ZnO was obtained by ultrasonic microspectroscopy (UMS) using very conductive and resistive (001), (100), and (101)ZnO specimens, grown by the hydrothermal method. The specimens were selected from a lot of small ZnO crystals evaluated with the velocity of leaky surface acoustic waves (LSAWs) on a water-loaded specimen surface, in order to identify proper specimens or proper measurement positions for bulk-wave velocity measurements. The constants were determined with measured bulk-wave velocities, according to the determination procedures developed previously. Their accuracies were estimated by comparing the measured LSAW velocities with the calculated ones using the determined constants, within 3.1 m/s. We observed LSAW velocity distributions and bulk-wave velocity dispersions for some specimens that were related to the resistivity distributions on the specimen surfaces and inside the specimens. We established experiment procedures to apply our UMS technology to ZnO crystals in this study. This ultrasonic method is useful for further understanding ZnO crystal growth processes in the hydrothermal method. This application is extended to other class-$6mm$ crystals.

• Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
• 2010-02-25

著者

• OHASHI Yuji

  Department of Chemistry and Materials Science Tokyo Institute of Technology

• Kushibiki Jun-ichi

  Deparment Of Electrical Engineering Faculty Of Engineering Tohoku University

• Arakawa Mototaka

  Department Of Electrical Engineering Tohoku University

• Yuji Ohashi

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

• Jun-ichi Kushibiki

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

• Tomoya Tanaka

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

• Sho Yoshida

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

• Yuusuke Kourai

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

• Noboru Sakagami

  Department of Electrical Engineering, Tohoku University, Sendai 980-8579, Japan

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