Reflection and refraction of acoustic waves from the insulator-magnetoacoustic material interface

Pleiades Publishing Ltd - Tập 48 - Trang 893-900 - 2003
M. M. Karpuk1, D. A. Kostyuk2, Yu. A. Kuzavko3, V. G. Shavrov3
1Politechnica Kostalinska, Koszalin, Poland
2Brest State Technical University, Brest, Belarus
3Institute of Radio Engineering and Electronics, Russian Academy of Sciences, Moscow, Russia

Tóm tắt

The reflection and refraction of longitudinal and transverse acoustic waves by the plane interface between an insulator and an easy-plane antiferromagnet undergoing a magnetic-field-induced orientational phase transition are analyzed. The angles of refraction, as well as all four coefficients of wave conversion, can be effectively controlled by varying the field. Conditions for the appearance of the critical angles of internal reflection and the effect of the magnetic field on these angles are considered. A glancing wave radiated into the material is shown to be a possibility near the phase transition.

Tài liệu tham khảo

E. A. Turov and V. G. Shavrov, Usp. Fiz. Nauk 140, 429 (1983) [Sov. Phys. Usp. 26, 593 (1983)].

Yu. A. Kuzavko and V. G. Shavrov, Akust. Zh. 39, 1088 (1993) [Acoust. Phys. 39, 572 (1993)].

Yu. A. Kuzavko, H. Roth, and V. Golovko, in Proceedings of Workshop on Design Methodologies for Signal Processing, Zakopane, 1996, p. 131.

E. Dieulesaint and D. Royer, Elastic Waves in Solids (Wiley, New York, 1981; Nauka, Moscow, 1982).