Effect of Interrow Magnetic Coupling on Band Structures of 2-D Magnonic Crystal Waveguides

Author

Fu Sheng Ma ; Hock Siah Lim ; Zhi Kui Wang ; Piramanayagam, S.N. ; Ser Choon Ng ; Meng Hau Kuok

Author_Institution

Dept. of Phys., Nat. Univ. of Singapore, Singapore, Singapore

Volume

47

Issue

10

fYear

2011

Firstpage

2689

Lastpage

2692

Abstract

We report a micromagnetic investigation of the propagation of spin waves in bi-component magnonic crystal waveguides. The investigated nanostructured waveguides are in the form of regular square lattice arrays of circular Fe dots embedded in a yttrium iron garnet matrix. Magnonic bandgaps of the order of 10 GHz are observed in both calculated frequency power spectra and dispersion curves of spin wave. The effect of the variation of the period along the direction perpendicular to spin wave propagation on magnonic band structures of magnonic crystal waveguides has been investigated. Micromagnetic simulations show that the first bandgap is more sensitive to variations of period than the second bandgap.

Keywords

energy gap; ferrite waveguides; ferrites; garnets; iron; magnons; micromagnetics; nanomagnetics; nanostructured materials; spin waves; wave propagation; yttrium compounds; 2D magnonic crystal waveguides; Fe-YFeO₃; band structure; circular iron dots; dispersion curves; frequency 10 GHz; frequency power spectra; interrow magnetic coupling effect; magnonic band gap; micromagnetic simulations; nanostructured waveguides; spin wave propagation; square lattice arrays; yttrium iron garnet; Couplings; Crystals; Dispersion; Iron; Photonic band gap; Saturation magnetization; Bandgap; magnonic crystals (MCs); micromagnetic simulations; spin waves;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2011.2156767

Filename

6027814