Magnetic Properties of Fibonacci-Modulated Fe-Au Multilayer Metamaterials

Abstract

Herein we experimentally study magnetic multilayer metamaterials with broken translational symmetry. Epitaxially-grown iron-gold (Fe-Au) multilayers modulated using Fibonacci sequence—referred to as magnetic inverse Fibonacci-modulated multilayers (IFMs)—are prepared using ultra-high-vacuum vapor deposition. Experimental results of in-situ reflection high-energy electron diffraction, magnetization curves, and ferromagnetic resonance demonstrate that the epitaxially-grown Fe-Au IFMs have quasi-isotropic magnetization, in contrast to the in-plane magnetization easy axis in the periodic multilayers.

The Fibonacci quasicrystal: Case study of hidden dimensions and multifractality

“…Magnetic multilayers composed of Fe=Cr layers and studied by the magneto-optic Kerr effect and ferromagnetic resonance should display self-similar magnetization versus curves and interesting thermodynamic signatures (Bezerra, Albuquerque, and Cottam, 2001). Another promising system is composed of epitaxially grown layers of Fe and Au using ultrahigh-vacuum vapor deposition (Suwa et al, 2017), which were theoretically predicted to have anomalous magnetoresistance (Machado et al, 2012).…”

Metamaterials with magnetism and chirality

“…Furthermore, another symmetry-for example, translational symmetry-can be broken in quasi-periodic metamaterials [203][204][205]. From this point of view, metamaterials with simultaneously broken time-reversal and translational symmetries, very similar to quasi-periodic magnonic crystals [206][207][208][209][210][211], remain attractive to researchers in the field of magnetic metamaterials.…”

Enhanced Magneto-Optical Activities of Modulated Fe - Pt Multilayer Metamaterials

“…It is anticipated that broken short-range translational symmetry in magnetic multilayers leads to modulation in exchange coupling between magnetic layers, resulting in intriguing magnetic phenomena [26][27][28][29]. Indeed, modulated magnetic multilayer metamaterials were theoretically predicted to give rise to anomalous magnetic resistance [30] and ferromagnetic resonance [31], and were experimentally demonstrated to bring about quasi-isotropic magnetization [32]. Nevertheless, enhancement of light-matter interaction in such modulated magnetic multilayer metamaterials has yet to be explored experimentally.…”