Piezoelectric acoustic wave characteristics of Pb(In0.5Nb0.5)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystal substrate: A comparative study with and without SiO2 overlay

Piezoelectric acoustic wave characteristics of Pb(In0.5Nb0.5)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystal substrate: A comparative study with and without SiO2 overlay
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Pb(In0.5Nb0.5)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3单晶衬底的压电声波特性:有无SiO2覆盖层的比较研究

DOI:
10.1063/5.0095058
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发表时间:
2022-07
影响因子:
3.2
通讯作者:
Haosu Luo
Haosu Luo
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Qiaozhen Zhang;Rufan Du;Baichuan Li;Huiling Liu;Xiangyong Zhao;Ziyun Chen;Haosu Luo

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本文研究了压电声波在旋转y切x传播Pb(in 0.5 Nb 0.5) o3 -Pb(Mg 1/3 Nb 2/3) o3 - pbtio3 (PIN-PMN-PT)弛豫铁电单晶衬底中的激发和传播特性。采用有限元软件COMSOL进行了声波特性数值模拟。为了进行比较,我们考虑了两种结构:一种是传统的金属电极/YX-PIN-PMN-PT,另一种是二氧化硅(sio2)覆盖层/金属电极/YX-PIN-PMN-PT衬底。结果表明,剪切-水平(SH)型压电边界声波(PBAW)存在于sio2覆盖层/金属电极/YX-PIN-PMN-PT衬底中,并提供了相当大的机电耦合系数k2(30%)。与在金属电极/YX-PIN-PMN-PT衬底中激发的表面声波相比,sh型PBAW同时获得了更大的相速度和显着改善的质量因子(~ 3500),这对于高性能机电换能器的应用是有希望的。
This paper investigates the excitation and propagation characteristics of a piezoelectric acoustic wave propagating in a rotated Y-cut X-propagating Pb(In 0.5 Nb 0.5 )O 3 -Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIN-PMN-PT) relaxor-based ferroelectric single crystal substrate. Numerical simulations were performed to evaluate the acoustic wave properties by FEM software COMSOL. For comparison, two types of structures are taken into consideration: one is the traditional metal electrode/YX-PIN-PMN-PT and the other is silicon dioxide (SiO 2 ) overlay/metal electrode/YX-PIN-PMN-PT substrate. It is shown that shear-horizontal (SH)-type piezoelectric boundary acoustic waves (PBAW) exist in the SiO 2 overlay/metal electrode/YX-PIN-PMN-PT substrate and offer a fairly large electromechanical coupling factor K 2 of 30%. Compared to a surface acoustic wave excited in the metal electrode/YX-PIN-PMN-PT substrate, enlarged phase velocity and significantly improved quality factor (∼3500) are simultaneously obtained for SH-type PBAW, which are promising for electromechanical transducer applications with high performance.
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