Abstract

Nonlinear Magnetoacoustics of Rare-Earth Orthoferrites

B.Zon, D.L.Dorofeev, A.A.Krivchenkova, G.V.Pakhomov (Physical Department, Voronezh State University, Voronezh, Russia)

e-mail: zon@niif.vsu.ru

Nonlinear acoustic effects in the crystals of rare-earth orthoferrites are investigated. The experimentally detected process of the time-periodical energy exchange between the harmonics of magnetization in YFeO3 [B.A.Zon, G.V.Pakhomov, Nonlinear interaction of magnetoelastic waves in yttrium orthoferrite // Letters to JETP 70, 12 (1999)] is theoretically explained. Investigation of the above effects allows us to make a comparison with the same effects in nonlinear optics as well as estimate the magnetic and acoustic parameters of the orthoferrites, which are widely used in ultrasound and magnetooptic devices.

Section : 2