Transmission fingerprints in quasiperiodic magnonic multilayers

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:323

Article

Coelho, I. P.^1,2  Vasconcelos, M. S.³  Bezerra, C. G.¹ 

[1] Univ Fed Rio Grande do Norte, Dept Fis, BR-59072970 Natal, RN, Brazil

[2] Inst Fed Educ Ciencia & Tecnol Maranhao, Dept Ensino Super, BR-65919050 Imperatriz, MA, Brazil

[3] Univ Fed Rio Grande do Norte, Escola Ciencias & Tecnol, BR-59072970 Natal, RN, Brazil

关键词: Ferromagnetic material;    Magnonic multilayer;    Spin wave;    Quasicrystal;   

DOI  :  10.1016/j.jmmm.2011.07.003

来源: Elsevier

【 摘 要 】

In this paper we investigated the influence of mirror symmetry on the transmission spectra of quasiperiodic magnonic multilayers arranged according to Fibonacci, Thue-Morse and double period quasiperiodic sequences. We consider that the multilayers composed of two simple cubic Heisenberg ferromagnets with bulk exchange constants J(A) and J(B) and spin quantum numbers S-A and S-B, respectively. The multilayer structure is surrounded by two semi-infinite slabs of a third Heisenberg ferromagnetic material with exchange constant J(C) and spin quantum number S-C. For simplicity, the lattice constant has the same value a in each material, corresponding to epitaxial growth at the interfaces. The transfer matrix treatment was used for the exchange-dominated regime, taking into account the random phase approximation (RPA). Our numerical results illustrate the effects of mirror symmetry on (i) transmission spectra and (ii) transmission fingerprints. (C) 2011 Elsevier B.V. All rights reserved.

【 授权许可】

Free