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Paper Abstract and Keywords
Presentation 2010-09-30 10:25
Acoustical Physical Constants of La3Ta0.5Ga5.3Al0.2O14 Single Crystal
Yuji Ohashi (Tohoku Univ.), Tomoaki Karaki, Tao Lv (Toyama Pref. Uinv.), Mototaka Arakawa (Tohoku Univ.), Masatoshi Adachi (Toyama Pref. Uinv.), Jun-ichi Kushibiki (Tohoku Univ.) US2010-61
Abstract (in Japanese) (See Japanese page) 
(in English) We measured accurate acoustical physical constants and their temperature coefficients for La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal using the ultrasonic microspectroscopy (UMS) technology combined with the resonance method. Acoustic properties were measured at 20, 23, and 26°C by the UMS system for X-, Y-, Z-, 29.14°Y-, and 150.86°Y-cut specimens prepared from an LTGA ingot. Using the measured results (longitudinal- and shear-wave velocities, dielectric constants, density, and thermal expansion coefficients), we determined acoustical physical constants and their temperature coefficients around room temperatures. To confirm the accuracy of the determined constants, we compared the measured LSAW velocities and calculated ones using the determined constants at 23°C, resulting in good agreement within -3.0 to 1.1 m/s for all propagation directions. Using four X-cut rotated Y-bar (-30°Y, -15°Y, 0°Y, +30°Y) specimens and Y-cut specimen prepared from the same ingot, we also obtained the temperature coefficients in a range from -30 to +80°C by the resonance method. These temperature coefficients were corrected with the accurate ones obtained by the UMS technology even for a narrow temperature range around room temperature. Through this method proposed, we believe that more reliable constants and temperature coefficients can be obtained in a desired temperature range.
Keyword (in Japanese) (See Japanese page) 
(in English) La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal / acoustical physical constants / temperature coefficient / ultrasonic microspectroscopy technology / resonance method / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 213, US2010-61, pp. 69-74, Sept. 2010.
Paper # US2010-61 
Date of Issue 2010-09-22 (US) 
ISSN Print edition: ISSN 0913-5685  Online edition: ISSN 2432-6380
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee US  
Conference Date 2010-09-29 - 2010-09-30 
Place (in Japanese) (See Japanese page) 
Place (in English) Tohoku Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English) General 
Paper Information
Registration To US 
Conference Code 2010-09-US 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Acoustical Physical Constants of La3Ta0.5Ga5.3Al0.2O14 Single Crystal 
Sub Title (in English)  
Keyword(1) La3Ta0.5Ga5.3Al0.2O14 (LTGA) single crystal  
Keyword(2) acoustical physical constants  
Keyword(3) temperature coefficient  
Keyword(4) ultrasonic microspectroscopy technology  
Keyword(5) resonance method  
1st Author's Name Yuji Ohashi  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
2nd Author's Name Tomoaki Karaki  
2nd Author's Affiliation Toyama Prefectural University (Toyama Pref. Uinv.)
3rd Author's Name Tao Lv  
3rd Author's Affiliation Toyama Prefectural University (Toyama Pref. Uinv.)
4th Author's Name Mototaka Arakawa  
4th Author's Affiliation Tohoku University (Tohoku Univ.)
5th Author's Name Masatoshi Adachi  
5th Author's Affiliation Toyama Prefectural University (Toyama Pref. Uinv.)
6th Author's Name Jun-ichi Kushibiki  
6th Author's Affiliation Tohoku University (Tohoku Univ.)
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Date Time 2010-09-30 10:25:00 
Presentation Time 25 
Registration for US 
Paper # IEICE-US2010-61 
Volume (vol) IEICE-110 
Number (no) no.213 
Page pp.69-74 
#Pages IEICE-6 
Date of Issue IEICE-US-2010-09-22 

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