Eur. Phys. J. B (2015) 88: 165
https://doi.org/10.1140/epjb/e2015-60084-7

Regular Article

Influence of dipole-dipole interactions on the angular dependence of ferromagnetic resonance spectra in arrays of Fe/Fe_xO_y core/shell nanocubes

¹ Centro de Investigación en Materiales Avanzados (CIMAV S.C.), Chihuahua/Monterrey, 31109 Chihuahua, Mexico
² Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, 06099 Halle ( Saale), Germany
³ CINVESTAV Unidad Querétaro, Libramiento Norponiente 2000, Fracc. Real de Juriquilla, 76230 Querétaro, Mexico

^a e-mail: paul.horley@cimav.edu.mx

Received: 30 January 2015
Received in final form: 7 April 2015
Published online: 24 June 2015

Abstract

We present a detailed theoretical study of the role of long-range dipole-dipole interactions on the angular dependence of ferromagnetic resonance spectra in a two-dimensional array of nanocubes. Variations of polar (φ) and azimuthal (θ) angles are studied numerically and analytically to illustrate the effect of the magnetocrystalline properties and the dipole-dipole interactions, forming complex resonance bands. In addition, we show that when the static magnetic field lies in the arrays’ plane under the angle of 129° with the edge of the array or when its tilted around 15° to the plane’s normal, the spectra of absorption transform into a plateau spanning from 0.1 T to 0.4 T, which is prominent enough for experimental observation.