Nonsymmetric spin pumping in a multiferroic heterostructure

Rovillain, Pauline; Oliveira, R. C. de; Marangolo, M.; Duquesne, Jean-Yves

doi:10.1103/physrevb.102.184409

Cited by 4 publications

(2 citation statements)

References 32 publications

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“…Lithium niobate (LiNbO

) is a ferro- and piezoelectric material with excellent optical properties and a wide variety of photonics [ 1 ] and other applications, e.g., in spin pumping systems [ 2 ]. However, Ashkin et al [ 3 ] observed that congruent material (i.e., crystal grown from a melt with a composition of 48.5 mol% Li

O and 51.5 mol% Nb

) suffers an alteration of the refractive index when irradiated by a 10 mW laser beam with a wavelength of

= 515 nm focused to a spot with a radius of 0.03 mm (ca.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Infrared Absorption and Lithium Sublattice Disorder in Magnesium-Doped Lithium Niobate

Kling

2023

Materials

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Lithium niobate is a ferro- and piezoelectric material with excellent optical properties and a wide variety of applications. The defect structures of congruent and Mg-doped crystals are still under intense discussion. In this work, undoped lithium niobate and magnesium-doped lithium niobate grown from congruent melt with the addition of 0 to 9 mol% MgO were investigated by infrared absorption, establishing the dependence of the absorbance on the Mg-doping level in two bands related to OH− stretching vibrations. The absorption band at 3485 cm−1 peaks at a MgO concentration in melt of 1 mol% and vanishes for MgO concentrations above the threshold level for optical damage suppression (4.8 mol%). A corresponding peak occurs in the minimum yield of the 7Li(p,α)4He reaction during ion channeling measurements, indicating a maximum of disorder in the Li sublattice. A possible explanation for this correlation is the attribution of this absorption band to ilmenite stacking fault sequences instead of isolated NbLi antisites in undoped and low-doped material. On the other hand, the OH− absorption band at 3535 cm−1 stays weak up to the MgO concentration threshold, and then increases, hinting to a defect related to the increase of vacancies due to the lack of charge compensation.

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“…Lithium niobate (LiNbO

O and 51.5 mol% Nb

) suffers an alteration of the refractive index when irradiated by a 10 mW laser beam with a wavelength of

= 515 nm focused to a spot with a radius of 0.03 mm (ca.…”

Section: Introductionmentioning

confidence: 99%

Correlation between Infrared Absorption and Lithium Sublattice Disorder in Magnesium-Doped Lithium Niobate

Kling

2023

Materials

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“…Recently, the so-called SAW induced Ferromagnetic Resonance (SAW-FMR) has been observed by Weiler et al [4], Thevenard et al [5], and Duquesne et al [6] in Ni, GaMnAs and Fe thin films, respectively, by exciting SAWs in the GHz and sub-GHz regime in piezoelectric media. Moreover, it is worthwhile to notice that SAW-FMR permits to reverse magnetization [7] and even to induce spin-pumping in CoPt bi-layers [8,9].…”

Section: Introductionmentioning

confidence: 99%

Impact of Spin Wave Dispersion on Surface Acoustic Wave Velocity

Rovillain¹,

Duquesne²,

Louis³

et al. 2022

Preprint

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The dependence of the velocity of surface acoustic wave (SAW) as a function of an external applied magnetic field is investigated in a Fe thin film epitaxially grown on a piezoelectric GaAs substrate. The SAW velocity is observed to strongly depend on both the amplitude and direction of the magnetic field. To interpret the experimental data a phenomenological approach to the relative change in SAW velocity is implemented. We find that the experimental velocity variation can be well reproduced provided that the spin wave dispersion is taken into account. The validity of this phenomenological model is attested by the comparison with a quasi-exact magnetoelastic one.

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Acoustically driven spin wave resonance in Ni/128° Y-cut LiNbO3 hybrid devices with the beam steering effect

Gao,

Xue,

et al. 2023

Applied Physics Letters

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We study the acoustically driven spin wave resonance (ADSWR) in a Ni film sputtered on a 128° Y-cut lithium niobate (LiNbO3) substrate under the condition that the beam steering effect exists due to the surface acoustic waves (SAWs) transmitted along several selected crystal orientations. SAW devices with that effect exhibit significantly different ADSWR spectra from devices without it. By using the magnetoelastic coupling theory and finite element simulation associated with SAW, we find that the beam steering effect of magnetoacoustic waves has an important influence on the acoustic attenuation. The relationship between its group velocity direction and the magnetization vector can be used to define the magnetoacoustic wave mode. The mode affects acoustic attenuation magnitude, which can break the fourfold symmetry. Increasing its power flow angle will significantly increase the maximum acoustic attenuation caused by magnon–phonon coupling.

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Nonsymmetric spin pumping in a multiferroic heterostructure

Cited by 4 publications

References 32 publications

Correlation between Infrared Absorption and Lithium Sublattice Disorder in Magnesium-Doped Lithium Niobate

Correlation between Infrared Absorption and Lithium Sublattice Disorder in Magnesium-Doped Lithium Niobate

Impact of Spin Wave Dispersion on Surface Acoustic Wave Velocity

Acoustically driven spin wave resonance in Ni/128° Y-cut LiNbO3 hybrid devices with the beam steering effect

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