Microwave Acoustic Attenuation in CTGS Single Crystals
Microwave Acoustic Attenuation in CTGS Single Crystals
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CTGS 单晶中的微波声衰减
DOI：
10.1109/tuffc.2021.3092831
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
H. Schmidt
中科院分区：
文献类型：
--
作者：
A. Sotnikov;B. Sorokin;N. Asafiev;D. Shcherbakov;G. Kvashnin;Y. Suhak;H. Fritze;M. Weihnacht;H. Schmidt
本文研究了单晶材料Ca3TaGa3Si2O14(CTGS=CaTangasite)的特殊材料性能。相对高度有序的晶体结构和可接受的压电强度使其成为极端条件下微声应用的候选材料。显然，这种晶体的低损耗动态行为是典型的，因此可以在高温下使用。作为一个特别的挑战，这里研究了千兆赫频率下的行为。为此，在1-6 GHz范围内进行了高泛音体声波谐振器(HBAR)类型的测量。对于纯或准纵模，选择五个不同的传播方向，可以从HBAR结果的品质因子中推导出动态粘性。观察到的频率依赖关系表明，在所研究的情况下，阿希泽行为是主要的损耗机制。
This article presents a study of special material properties of the single crystalline material Ca3TaGa3Si2O14(CTGS = Catangasite). The comparatively highly ordered crystal structure and acceptable piezoelectric strength make it a candidate for microacoustic applications under extreme conditions. Obviously, low-loss dynamic behavior is typical for this crystal which consequently enables high-temperature use. As a particular challenge, the behavior at gigahertz frequencies is investigated here. For that, High overtone Bulk Acoustic wave Resonator (HBAR) type measurements in the range of 1–6 GHz are performed. The selection of five distinctive propagation directions for exclusively pure or quasi-longitudinal modes enables to derive the dynamic viscosities from the quality factors of HBAR results. The observed frequency dependences exhibit Akhiezer behavior as the predominant loss mechanism in the cases examined.