Characterization of micrometric and superficial residual stresses using high frequency surface acoustic waves generated by interdigital transducers

2013 ◽  
Vol 134 (6) ◽  
pp. 4360-4371 ◽  
Author(s):  
Marc Duquennoy ◽  
Mohammadi Ouaftouh ◽  
Julien Deboucq ◽  
Jean-Etienne Lefebvre ◽  
Frederic Jenot ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Acoustic Waves ◽  
High Frequency ◽  
Surface Acoustic Waves

scholarly journals Characterization of Micrometric and Localised Residual Stresses on Amorphous Materials Using Dispersion of Surface Acoustic Waves

2014 ◽  
Vol 996 ◽  
pp. 392-397 ◽  
Author(s):  
Marc Duquennoy ◽  
Mohammadi Ouaftouh ◽  
Julien Deboucq ◽  
Jean Etienne Lefebvre ◽  
Frederic Jenot ◽  
...  
Keyword(s):  
Residual Stresses ◽  
Acoustic Waves ◽  
Inverse Method ◽  
Amorphous Materials ◽  
Surface Acoustic Waves ◽  
Potassium Nitrate ◽  
Ultrasonic Waves ◽  
Surface Reinforcement ◽  
Compression Layer

For amorphous materials such as glass, the fragility of the material can be limited using surface reinforcement by chemical tempering. The principle of chemical tempering consists in forming a superficial compression layer on the surface by immersing the glass in a solution of molten potassium nitrate. In this study, dispersion of surface ultrasonic waves caused by the presence of residual surface stresses was studied. The thickness and the level of the stressed cortical zones were estimated using an inverse method.

Characterization of RF Sputtered ZnO Piezoelectric Films Using Transmission Electron Microscope

1975 ◽  
Vol 33 ◽  
pp. 86-87
Author(s):  
Kemining W. Yeh ◽  
Richard S. Muller ◽  
Wei-Kuo Wu ◽  
Jack Washburn
Keyword(s):  
Integrated Circuit ◽  
Acoustic Waves ◽  
New Technology ◽  
Surface Acoustic Waves ◽  
Electromechanical Properties ◽  
Leading Role ◽  
Saw Devices ◽  
Transmission Electron ◽  
High Degree

Considerable and continuing interest has been shown in the thin film transducer fabrication for surface acoustic waves (SAW) in the past few years. Due to the high degree of miniaturization, compatibility with silicon integrated circuit technology, simplicity and ease of design, this new technology has played an important role in the design of new devices for communications and signal processing. Among the commonly used piezoelectric thin films, ZnO generally yields superior electromechanical properties and is expected to play a leading role in the development of SAW devices.

scholarly journals Highly Sensitive Surface Acoustic Wave Magnetic Field Sensor Using Multilayered TbCo2/FeCo Thin Film

Proceedings ◽  
2018 ◽  
Vol 2 (13) ◽  
pp. 902 ◽  
Author(s):  
Aurelien Mazzamurro ◽  
Abdelkrim Talbi ◽  
Yannick Dusch ◽  
Omar Elmazria ◽  
Philippe Pernod ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Thin Film ◽  
Acoustic Waves ◽  
Surface Acoustic Waves ◽  
Magnetic Field Sensor ◽  
Nanostructured Thin Film ◽  
Highly Sensitive ◽  
Magnetic Model ◽  
Field Sensor

Over the last decades, the use of Surface Acoustic Waves (SAW) has emerged as a promising technology in many applications such as filters, signal processing but also sensors. We report the fabrication and the characterization of a SAW delay line magnetic field sensor using uniaxial multi-layered 14×[TbCo2(3.7nm)/FeCo(4nm)] nanostructured thin film deposited on Y36° Lithium Niobate (Figure 1a). The sensor shows an interesting dependency to a tunable bias magnetic field with different orientations relative to the easy axis. The obtained results are well explained using an equivalent piezo-magnetic model described in a previous work.

A low-power droplet manipulator employing high-frequency surface acoustic waves

2009 ◽  
Vol 92 (4) ◽  
pp. 49-55
Author(s):  
Tsutomu Sasaki ◽  
Yasutomo Tanaka ◽  
Tatsuya Omori ◽  
Ken-Ya Hashimoto ◽  
Masatsune Yamaguchi
Keyword(s):  
Low Power ◽  
Acoustic Waves ◽  
High Frequency ◽  
Surface Acoustic Waves

Generating Near-THz Surface Acoustic Waves Using Picosecond Ultrasonics

2009 ◽  
Author(s):  
J. H. Lee ◽  
J. S. Sadhu ◽  
S. Sinha
Keyword(s):  
Rise Time ◽  
Acoustic Waves ◽  
High Frequency ◽  
Short Pulse ◽  
Surface Acoustic Waves ◽  
Grating Period ◽  
Critical Parameters ◽  
Generation Process ◽  
Short Pulse Laser ◽  
Substrate Properties

We present here a technique to generate high frequency SAW in non-piezoelectric substrate with nanostructure grating of period less than 100 nm fabricated on it. A short pulse laser (with rise time less than 100fs) incident on this structure creates a periodic thermal stress due to the differential absorption in the substrate and the grating. We show that this stress sets up a surface acoustic wave on the substrate that can be detected optically. Modeling the generation process and analysis of SAW spectrum reveals the critical parameters to be controlled for obtaining SAW of high frequency. We show that the grating period less than 50 nm, a laser pulse of rise time less than 100fs and substrate properties like high optical absorption and high Rayleigh velocity are necessary for generating surface acoustic waves in near-THz range. This work provides quantitative guidelines on the design of near THz phononics.

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