Field dependence of coupling efficiency between electromagnetic field and ultrasonic bulk waves

Ogi, Hirotsugu

Journal of Applied Physics, 1997, 82(8), 3940-3949

Number of Access:509（2025-11-25 02:18 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/84231

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Title
Field dependence of coupling efficiency between electromagnetic field and ultrasonic bulk waves
Creator
NRID
1000090252626 1000090252626
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Scopus Author ID
35563683500 35563683500
ORCID
0000-0002-9602-5194 0000-0002-9602-5194
CreatorName
Ogi, Hirotsugu
Description
Ogi H. "Field dependence of coupling efficiency between electromagnetic field and ultrasonic bulk waves", Journal of Applied Physics, 82(8), 3940-3949 (1997) https://doi.org/10.1063/1.365701.
Abstract
The coupling mechanism of the electromagnetic acoustic transducer (EMAT) for bulk waves has been studied by examining the magnetic-field dependence of the wave amplitudes. A spiral elongated coil placed on a thin plate of low carbon steel excites and receives the longitudinal and the shear waves propagating in the thickness direction in the presence of the bias magnetic field. The field dependences of the bulk-wave amplitudes are measured using the electromagnetic acoustic resonance both for the normal and tangential bias fields, which showed different features, depending on the bias-field direction and the wave mode. A two-dimensional model is presented for the explanation of the observed results. The present analysis emphasizes the inclined total field in the derivation of the magnetostriction constants, which is revealed to play an essential role for the wave generation Both the measurement and the model analysis conclude that the magnetostrictive effect dominates the EMAT phenomena for the bulk waves in ferromagnetic metal, regardless of the bias field direction © 1997 American Institute of Physics.
Publisher
American Institute of Physics
Source Title
Journal of Applied Physics
Volume (Issue)
82(8)
Page
3940-3949
Date of Issued
1997-10-15
Language
English
Handle URL
https://hdl.handle.net/11094/84231
PISSN
00218979
eISSN
10897550
NCID
AA00693547
AA11868165
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1063/1.365701
Access Rights
open access
CopyRight
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics, 82(8), 3940-3949 (1997) and may be found at https://doi.org/10.1063/1.365701.
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学術雑誌論文 Journal Article