HIGH HARMONIC-GENERATION AND TURBULENCE OF MAGNETOELASTIC EXCITATIONSIN HEMATITE SINGLE-CRYSTAL

Citation
V. Preobrazhensky et P. Pernod, HIGH HARMONIC-GENERATION AND TURBULENCE OF MAGNETOELASTIC EXCITATIONSIN HEMATITE SINGLE-CRYSTAL, Journal of applied physics, 81(8), 1997, pp. 5709-5711
Citations number
7
Categorie Soggetti
Physics, Applied
Journal title
ISSN journal
00218979
Volume
81
Issue
8
Year of publication
1997
Part
2B
Pages
5709 - 5711
Database
ISI
SICI code
0021-8979(1997)81:8<5709:HHATOM>2.0.ZU;2-R
Abstract
Strongly nonlinear resonance of the longitudinal magnetoelastic wave i n a hematite single crystal has been studied experimentally, Generatio n of more than 40 acoustic harmonics by means of a sinusoidal rf magne tic field has been observed in periodic oscillations. Two typical kind s of bifurcations evoked by the variation of external parameters (bias magnetic-field strength, rf field frequency, and amplitude) have been found. The first one corresponds to a slow automodulation of the peri odic ultrasonic excitation. The second one is accompanied by fast chao tic oscillations in the temporal domain and by generation of a few inc ommensurate frequencies in the ultrasonic spectrum similarly to quasip eriodic scenarios of turbulence. (C) 1997 American Institute of Physic s.