Band gap tunability of magneto-elastic phononic crystal

Matar, Olivier Bou; Robillard, J.F.; Vasseur, J. O.; Hladky‐Hennion, Anne‐Christine; Deymier, Pierre A.; Pernod, Philippe; Preobrazhensky, V.

doi:10.1063/1.3687928

Cited by 123 publications

(60 citation statements)

References 50 publications

(57 reference statements)

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“…(8) of Ref. [26]). In general, this energy involves all possible products of two components of the spins and all possible polarizations of the displacement.…”

Section: -2mentioning

confidence: 99%

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Phonon-magnon resonant processes with relevance to acoustic spin pumping

et al. 2014

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The recently described phenomenon of resonant acoustic spin pumping is due to resonant coupling between an incident elastic wave and spin waves in a ferromagnetic medium. A classical one-dimensional discrete model of a ferromagnet with two forms of magnetoelastic coupling is treated to shed light on the conditions for resonance between phonons and magnons. Nonlinear phonon-magnon interactions in the case of a coupling restricted to diagonal terms in the components of the spin degrees of freedom are analyzed within the framework of the multiple timescale perturbation theory. In that case, one-phonon-two-magnon resonances are the dominant mechanism for pumping. The effect of coupling on the dispersion relations depends on the square of the amplitude of the phonon and magnon excitations. A straightforward analysis of a linear phonon-magnon interaction in the case of a magnetoelastic coupling restricted to off-diagonal terms in the components of the spins shows a one-phonon to one-magnon resonance as the pumping mechanism. The resonant dispersion relations are independent of the amplitude of the waves. In both cases, when an elastic wave with a fixed frequency is used to stimulate magnons, application of an external magnetic field can be used to approach resonant conditions. Both resonance conditions exhibit the same type of dependency on the strength of an applied magnetic field.

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“…(8) of Ref. [26]). In general, this energy involves all possible products of two components of the spins and all possible polarizations of the displacement.…”

Section: -2mentioning

confidence: 99%

“…(10) of Ref. [26]). The first term corresponds to the interaction between the diagonal components of the strain and spins.…”

Section: -2mentioning

confidence: 99%

Phonon-magnon resonant processes with relevance to acoustic spin pumping

et al. 2014

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“…Other investigators have considered controlling phonons in PCs with external stimuli such as an applied magnetic field. 30,31 In these works, exploitation of magnetoacoustic coupling led to PCs with tunable acoustic properties 30 and facilitated the development of reconfigurable phononic waveguides. 31 Indeed these functionalities are unattainable in ordinary materials which gives tunable phononic systems a distinct advantage over other technologies for future industrial applications.…”

Section: Introductionmentioning

confidence: 99%

“…30,31 In these works, exploitation of magnetoacoustic coupling led to PCs with tunable acoustic properties 30 and facilitated the development of reconfigurable phononic waveguides. 31 Indeed these functionalities are unattainable in ordinary materials which gives tunable phononic systems a distinct advantage over other technologies for future industrial applications. With this as motivation, we aim to explore the scientific and technological merit of incorporating chalcogenide glasses into phononic crystal designs.…”

Section: Introductionmentioning

confidence: 99%

Optically tunable acoustic wave band-pass filter

2014

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The acoustic properties of a hybrid composite that exhibits both photonic and phononic behavior are investigated numerically with finite-element and finite-difference time-domain simulations. The structure is constituted of a periodic array of photonic resonant cavities embedded in a background superlattice. The resonant cavities contain a photo-elastic chalcogenide glass that undergoes atomic-scale structural reorganization when irradiated with light having energy close to its band-gap. Photo-excitation of the chalcogenide glass changes its elastic properties and, consequently, augments the acoustic transmission spectrum of the composite. By modulating the intensity of light irradiating the hybrid photonic/phononic structure, the position and spectral width of phonon passing-bands can be controlled. This demonstration offers the technological platform for optically-tunable acoustic wave band-pass filters.

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“…PCs have many applications, such as vibration isolation technology [18][19][20][21][22] , acoustic barriers/filters [23][24][25] , noise suppression devices [26][27] , surface acoustic devices 28 , architectural design 29 , sound shields 30 , acoustic diodes 31 , elastic metamaterials [21][22]25,27,32 and thermal metamaterials [33][34][35][36][37][38][39] . There are also smart PCs that have been studied, such as piezoelectric [40][41][42][43][44][45][46][47][48][49][50][51][52][53][54] , piezomagnetic [55][56][57][58] and magnetoelectroelastic 14,[59][60][61]…”

Section: Introductionmentioning

confidence: 99%

Complete Band Gaps in Nano-Piezoelectric Phononic Crystals

Miranda

Santos

2017

Mat. Res.

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We study the band structure of elastic waves propagating in a nano-piezoelectric phononic crystal consisting of a polymeric matrix reinforced by BaTiO 3 inclusions in square, rectangular, triangular, honeycomb and Kagomé lattices. We also investigate the influence of inclusion cross section geometrycircular, hollow circular, square and rotated square with a 45º angle of rotation with respect to x and y axes. Plane wave expansion method is used to solve the governing equations of motion of a piezoelectric solid based on classical elasticity theory, ignoring nanoscopic size effects, considering two-dimensional periodicity and wave propagation in the xy plane. Complete band gaps between XY and Z modes are observed for all inclusions and the best performance is for circular inclusion in a triangular lattice. Piezoelectricity influences significantly the band gaps for hollow circular inclusion in lower frequencies. We suggest that nano-piezoelectric phononic crystals are feasible for elastic vibration management in GHz.

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Band gap tunability of magneto-elastic phononic crystal

Cited by 123 publications

References 50 publications

Phonon-magnon resonant processes with relevance to acoustic spin pumping

Phonon-magnon resonant processes with relevance to acoustic spin pumping

Optically tunable acoustic wave band-pass filter

Complete Band Gaps in Nano-Piezoelectric Phononic Crystals

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