Sarmah Ritupan, Ananthakrishna G
Materials Research Centre, Indian Institute of Science, Bangalore 560012, India.
Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Jul;86(1 Pt 2):016204. doi: 10.1103/PhysRevE.86.016204. Epub 2012 Jul 6.
We develop a coupled nonlinear oscillator model involving magnetization and strain to explain several experimentally observed dynamical features exhibited by forced magnetostrictive ribbon. Here we show that the model recovers the observed period-doubling route to chaos as function of the dc field for a fixed ac field and quasiperiodic route to chaos as a function of the ac field, keeping the dc field constant. The model also predicts induced and suppressed chaos under the influence of an additional small-amplitude near-resonant ac field. Our analysis suggests rich dynamics in coupled order-parameter systems such as magnetomartensitic and magnetoelectric materials.
我们开发了一个涉及磁化和应变的耦合非线性振荡器模型，以解释在强制磁致伸缩带材中实验观察到的几种动力学特征。在此我们表明，对于固定的交流场，该模型恢复了作为直流场函数的观测到的倍周期通向混沌的路径，以及对于保持直流场恒定的情况，作为交流场函数的准周期通向混沌的路径。该模型还预测了在附加小振幅近共振交流场影响下的诱导混沌和抑制混沌。我们的分析表明，在诸如磁马氏体和磁电材料等耦合序参量系统中存在丰富的动力学。
