Band gap tunability of magneto-elastic phononic crystal
Band gap tunability of magneto-elastic phononic crystal
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DOI：
10.1063/1.3687928
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发表时间：
2012-03-01
影响因子：
3.2
通讯作者：
Preobrazhensky, V.
中科院分区：
文献类型：
--
作者：
Matar, O. Bou;Robillard, J. F.;Preobrazhensky, V.
研究了通过引入主动磁弹性材料和外加磁场来控制和调谐声子晶体能带结构的可能性。考虑了磁弹性材料中获得大弹性性质变化的两种方法：巨磁致伸缩效应和自旋重取向转变效应。用平面波展开法计算了晶体的能带结构。磁致弹性耦合是考虑到通过考虑一个等效的压磁材料模型与弹性，压磁，和磁导率张量作为施加的磁场的幅度和方向的函数而变化。研究了Terfenol-D方棒嵌入环氧树脂基体的二维声子晶体的绝对带隙的非接触可调性。(C)2012年美国物理学会。[http：//dx.doi.org/10.1063/1.3687928]
The possibility of control and tuning of the band structures of phononic crystals offered by the introduction of an active magnetoelastic material and the application of an external magnetic field is studied. Two means to obtain large elastic properties variations in magnetoelastic material are considered: Giant magnetostriction and spin reorientation transition effects. A plane wave expansion method is used to calculate the band structures. The magnetoelastic coupling is taken into account through the consideration of an equivalent piezomagnetic material model with elastic, piezomagnetic, and magnetic permeability tensors varying as a function of the amplitude and orientation of the applied magnetic field. Results of contactless tunability of the absolute bandgap are presented for a two-dimensional phononic crystal constituted of Terfenol-D square rod embedded in an epoxy matrix. (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.3687928]