MAGNETO-OPTICAL MEASUREMENTS OF COLLECTIVE SPIN DYNAMICS OF TWO-DIMENSIONAL ARRAYS OF FERROMAGNETIC NANOELEMENTS
MAGNETO-OPTICAL MEASUREMENTS OF COLLECTIVE SPIN DYNAMICS OF TWO-DIMENSIONAL ARRAYS OF FERROMAGNETIC NANOELEMENTS
复制标题
铁磁纳米元件二维阵列集体自旋动力学的磁光测量
DOI：
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发表时间：
2013
期刊：
影响因子：
--
通讯作者：
S. Bose
中科院分区：
文献类型：
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作者：
B. Rana;A. Barman;S. Bose
磁性纳米点阵列是纳米技术未来应用的有趣系统，包括图案化磁介质、磁振子晶体、磁逻辑、传感器、STNO和生物医学应用。所有的应用程序需要在不同的时间和长度尺度的磁性纳米点阵列的磁化过程的知识库。本文综述了磁性纳米点阵列中皮秒旋进磁化动力学的实验研究现状。我们讨论了磁性纳米点阵列的制备方法以及旋进动力学的光学激发和检测方法。我们进一步讨论了全光激发和检测的进动动力学在Ni80Fe20（坡莫合金）纳米点阵列的宽度在200 nm和50 nm之间，与点间间距在50 nm和400 nm之间。从强集体动力学到完全孤立动力学的转变，通过各种弱集体制度，进动频率和阻尼的变化与点间分离，偶极和四极点间相互作用的影响，点的大小的变化对单个元素和阵列的动力学的影响，以及集体动力学的各向异性已被深入研究的实验和微磁学模拟结果。最后，我们讨论了磁性纳米点阵列动力学的未来研究方向。
Magnetic nanodot arrays are interesting systems for future applications in nanotechnology including patterned magnetic media, magnonic crystals, magnetic logic, sensors, STNOs and biomedical applications. All applications require the knowledge base of magnetization processes of magnetic nanodot arrays at various time and length scales. Here, we review the present status of experimental studies of picosecond precessional magnetization dynamics in magnetic nanodot arrays. We discuss the fabrication methods of magnetic nanodot arrays and excitation and detection methods of precessional dynamics by optical means. We further discuss the all-optical excitation and detection of precessional dynamics in Ni80Fe20 (permalloy) nanodot arrays with width between 200 nm and 50 nm and with interdot separation between 50 nm and 400 nm. A transition from strongly collective dynamics to completely isolated dynamics through various weakly collective regimes, variation of precession frequency and damping with the interdot separation, effects of dipolar and quadrupolar interdot interaction, effects of the variation of dot size on the dynamics of single elements and arrays, and anisotropy of collective dynamics have been thoroughly studied by experimental and micromagnetic simulation results. Finally, we discuss the future directions in the research on the dynamics of magnetic nanodot arrays.
影响因子：
4
作者：
P. Keatley;P. Gangmei;M. Dvornik;R. Hicken;J. Childress;J. Katine
通讯作者：
P. Keatley;P. Gangmei;M. Dvornik;R. Hicken;J. Childress;J. Katine
影响因子：
3.3
作者：
Mijailovich, SM;Kojic, M;Fredberg, JJ
通讯作者：
Fredberg, JJ