|
|
|
Science Newsletter of the Faculty fo Physics
This is a new bulletin, which, as we hope, will bring fresh, updated information on scientific news, research activities, and related events in the life of our department to our staff members, undegraduate and graduate students, postdocs, collaborators and partners. We greatly hope that this Science Newsletter will help us to find new partners in research and shorten the way from fundamental research to applications and innovations, from our fundamental discoveries to their successful implementations in not too distant future.
XIV National School-Seminar "Wave phenomena in inhomogeneous media"
The conference papers from the School-Seminar «Waves-2014» will be submitted for publishing in the Memoirs of the Faculty of Physics journal.
| Journals » Memoirs of the Faculty of Physics » Issues » 2014 » # 5 |
The influence of electrical boundary conditions on the occurrence of anomalous resisto-acoustic effect
I.E. Kuznetsova, B.D.Zaitsev
Kotel’nikov Institute of Radio Engineering and Electronics of RAS. Mokhovaya str., 11, bld.7, Moscow 125009, RussiaAs known, anomalous resisto-acoustic effect is a fundamental property for weakly inhomogeneous piezoactive waves (Bleustein - Gulyaev, Love, and some leaky waves). It consists in that the velocity of aforementioned waves first increases, achieves its maximum, and only then decreases with growing conductance of a layer placed at the surface of piezoelectric half-space. In this paper we continue to study the peculiarities of the effect occurence and the influence of different electrical boundary conditions on its characteristics. Conditions have been found under which the said effect occurs and, respectively, dissappears. The magnitude of positive change in velocity with growing layer conductance is demonstrated to be reduced up to zero as a layer with arbitrary conductance has been removed from the piezoelectric surface. The positive change in velocity is, respectively, increased with removing an perfectly conducting screen from the “piezoelectric half-space – conducting layer” structure. As piezoelectric the potassium niobate has been used. The obtained results are useful for a more deep understanding the physical bases of propagation of weakly inhomogeneous piezoactive acoustic waves.
| URL: | http://uzmu.phys.sunmarket.com/abstract/2014/5/145331 |
| PACS: | 72.50.+b Acoustoelectric effects |
| UDC: | 548:53+534.22. |
| Цитата: | И.Е. Кузнецова, Б.Д. Зайцев. Влияние электрических граничных условий на существование аномального резисто-акустического эффекта // Учен. зап. физ. фак-та Моск. ун-та. 2014. № 5. 145331 |