MAGNETIC-FLUID OSCILLATOR - OBSERVATION OF NONLINEAR PERIOD DOUBLING

被引：26

作者：

BACRI, JC

DORTONA, U

SALIN, D

机构：

[1] Laboratoire de Acoustique et Optique de la Matière Condensèe, Univerité Pierre et Marie Curie, 75252 Paris CEDEX 05, Tour 13

来源：

PHYSICAL REVIEW LETTERS | 1991年 / 67卷 / 01期

关键词：

D O I：

10.1103/PhysRevLett.67.50

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The peak pattern of a magnetic fluid, in both a vertical dc and an additional vertical ac magnetic field, behaves as an oscillator. Using the ac-dc field ratio as a control parameter, we study the dynamics of this oscillator. For low values, the peaks oscillate at the ac field frequency, whereas for a large enough value the oscillation is subharmonic (period doubling). The phase diagram is interpreted in terms of a bounded parametric resonance driven by the nonlinearity of the oscillator. In 2D this transition occurs with symmetry breaking from a triangular to a square pattern.

引用

页码：50 / 53

页数：4