• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Advanced Functional Materials >Tunable Magnonic Spectra in Two-Dimensional Magnonic Crystals with Variable Lattice Symmetry
【24h】

Tunable Magnonic Spectra in Two-Dimensional Magnonic Crystals with Variable Lattice Symmetry

机译：具有可变晶格对称性的二维磁控晶体中的可调谐磁能谱

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Tunable magnonic properties are demonstrated in two-dimensional magnonic crystals in the form of artificial ferromagnetic nanodot lattices with variable lattice symmetry. An all-optical time-domain excitation and detection of the collective precessional dynamics is performed in the strongly magnetostati-cally coupled Ni_(80)Fe_(20) (Py) circular dot lattices arranged in different lattice symmetry such as square, rectangular, hexagonal, honeycomb, and octagonal symmetry. As the symmetry changes from square to octagonal through rectangular, hexagonal and honeycomb, a significant variation in the spin wave spectra is observed. The single uniform collective mode in the square lattice splits in two distinct modes in the rectangular lattice and in three distinct modes in the hexagonal and octagonal lattices. However, in the honeycomb lattice a broad band of modes are observed. Micromagnetic simulations qualitatively reproduce the experimentally observed modes, and the simulated mode profiles reveal collective modes with different spatial distributions with the variation in the lattice symmetry determined by the magnetostatic field profiles. For the hexagonal lattice, the most intense peak shows a sixfold anisotropy with the variation in the azimuthal angle of the external bias magnetic field. Analysis shows that this is due to the angular variation of the dynamical component of magnetization for this mode, which is directly influenced by the variation of the magnetostatic field on the elements in the hexagonal lattice. The observations are important for tunable and anisotropic propagation of spin waves in magnonic crystal based devices.
机译：在具有可变晶格对称性的人造铁磁纳米点晶格形式的二维磁晶晶体中证明了可调谐的镁磁性能。在强磁固耦合的Ni_（80）Fe_（20）（Py）圆形点阵中以正方形，矩形，六角形等不同的点阵对称性进行全光学时域激发和集体进动动力学的检测，蜂窝和八边形对称。随着对称性从正方形变为八边形，再到矩形，六边形和蜂窝，自旋波谱将发生显着变化。正方形格子中的单一均匀集体模式在矩形格子中分为两种不同的模式，在六角形和八边形格子中分为三种不同的模式。但是，在蜂窝状晶格中观察到了广泛的模态。微磁模拟定性地再现了实验观察到的模式，并且模拟模式轮廓揭示了具有不同空间分布的集体模式，其中静磁场轮廓确定了晶格对称性的变化。对于六边形晶格，最强的峰显示六倍的各向异性，且外部偏置磁场的方位角发生变化。分析表明，这是由于该模式的磁化动态分量的角度变化所致，而该角度变化直接受到六边形晶格中元素上静磁场的变化的影响。这些观察对于在基于镁铁晶体的设备中自旋波的可调谐和各向异性传播非常重要。

著录项

  • 来源
    《Advanced Functional Materials》 |2013年第19期|2378-2386|共9页
  • 作者

    Susmita Saha; Ruma Mandal; Saswati Barman; Dheeraj Kumar; Bivas Rana; Yasuhiro Fukuma; Satoshi Sugimoto; YoshiChika Otani; Anjan Barman;

  • 作者单位

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

    Advanced Science Institute RIKEN.2-1 Hirosawa, Wako, Saitama 351-0198, Japan,Frontier Research Academy for Young Researchers Kyushu Institute of Technology lizuka, Fukuoka 820-8502, Japan;

    Advanced Science Institute RIKEN.2-1 Hirosawa, Wako, Saitama 351-0198, Japan,Institute for Solid State Physics University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

    Advanced Science Institute RIKEN.2-1 Hirosawa, Wako, Saitama 351-0198, Japan,Institute for Solid State Physics University of Tokyo 5-1-5 Kashiwanoha, Kashiwa, Chiba 277-8581, Japan;

    Department of Condensed Matter Physics and Material Sciences S. N. Bose National Centre for Basic Sciences Block JD, Sector III, Salt Lake, Kolkata 700098, India;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号