2105 Controlling Surface Acoustic Wave on GaAs Crystal via Large Scale Molecular Dynamics Analysis

2013 ◽  
Vol 2013.26 (0) ◽  
pp. _2105-1_-_2105-2_
Author(s):  
Ryo Hikata ◽  
Kenji Tsuruta ◽  
Kazuhiro Fujimori
Keyword(s):  
Molecular Dynamics ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
Large Scale ◽  
Dynamics Analysis ◽  
Gaas Crystal

Development of Multi-Ferroic Actuator/Sensor Material and Device for Intelligent/Smart Technology - Basic Design and Experimental Verification

2008 ◽  
Vol 54 ◽  
pp. 187-194 ◽  
Author(s):  
Yasubumi Furuya ◽  
Teiko Okazaki
Keyword(s):  
Magnetic Field ◽  
Acoustic Wave ◽  
Surface Acoustic Wave ◽  
High Speed ◽  
Large Scale ◽  
Coupling Effect ◽  
Active Material ◽  
Smart Technology ◽  
Internal Damage ◽  
Composite Actuator

Technical importance of multi-ferroic approach for designing advanced multi-functional actuator/sensors based on a mutual coupling effect between ferroic material elements is pointed out for intelligent/smart technology. Two types of multi-ferroic actuator/sensor devices. i.e. (1) magnetically driven composite actuator and (2) multi-functional surface acoustic wave (SAW) sensor by MEMS are presented. First, a large-scale robust composite actuator is the composite structure which is reinforced by the superelastic fiber or lamellar of shape memory alloys (TiNi) in the ferromagnetic metal (Ni) matrix. This multi-ferroic composite can be driven with high speed as well as considerably enhanced strain by applying a wireless magnetic field. Secondarily, multi-functionally designed, multi-ferroic senor device using surface acoustic wave (SAW) is introduced. On the surface part between IDTs, environmentally active material films such as SMA, FSMA, magnetostrictive alloy etc. are formed by magnetron-sputtering. Various environmental sensing parameters i.e. temperature, magnetic field strength, stress, loading hysteresis and internal damage etc. can be evaluated nondestructively from the signal analysis of amplitude and phase change of SAW. Consequently, these results show the promising new types of multi-functional composite actuator and sensor based on multi-ferroic effect.

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