Observation of frequency band gaps in a one-dimensional nanostructured magnonic crystal

被引：273

作者：

Wang, Z. K. ^{[1
]}

Zhang, V. L. ^{[1
]}

Lim, H. S. ^{[1
]}

Ng, S. C. ^{[1
]}

Kuok, M. H. ^{[1
]}

Jain, S. ^{[2
]}

Adeyeye, A. O. ^{[2
]}

机构：

[1] Natl Univ Singapore, Dept Phys, Singapore 117542, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

来源：

APPLIED PHYSICS LETTERS | 2009年 / 94卷 / 08期

关键词：

Brillouin spectra; cobalt; dispersion relations; energy gap; finite element analysis; magnons; nanolithography; nanostructured materials; Permalloy; spin waves; PHOTONIC CRYSTALS; SPIN-WAVES;

D O I：

10.1063/1.3089839

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report the experimental observation of band gaps in a synthetic nanostructured magnonic crystal composed of two different magnetic materials. The sample, in the form of a one-dimensional periodic array comprising alternating Permalloy and cobalt nanostripes, has been fabricated using advanced lithographic techniques. Dispersion relations of spin waves in the magnonic crystal have been mapped by Brillouin spectroscopy. The center frequency and width of the band gaps observed are tunable by an applied magnetic field. Dispersion relations calculated based on the finite element method accord with the measured data.

引用

页数：3

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