Characteristic wave speeds in the surface Brillouin scattering measurement of elastic constants of crystals

Every, A. G.; Kotane, Lesias Morake; Comins, J. D.

doi:10.1103/physrevb.81.224303

Cited by 14 publications

(4 citation statements)

References 22 publications

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“…In addition, also the edge of the continuum shoulder (transverse threshold, TT) that is put in evidence in Figure 13, was measured. More recently, it has been shown that, taking advantage of the RW peak, the TT edge and the dip of the LT, a simple and robust fitting procedure has been presented for determining the three independent elastic constants of a cubic thick film from surf-BLS, using InAs0.91Sb0.09 as the case study [69].…”

Section: Opaque Films: Rippling Of the Surface Guided Modes And Relementioning

confidence: 99%

Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review

Carlotti

2018

Applied Sciences

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There is currently a renewed interest in the development of experimental methods to achieve the elastic characterization of thin films, multilayers and acoustic resonators operating in the GHz range of frequencies. The potentialities of surface Brillouin light scattering (surf-BLS) for this aim are reviewed in this paper, addressing the various situations that may occur for the different types of structures. In particular, the experimental methodology and the amount of information that can be obtained depending on the transparency or opacity of the film material, as well as on the ratio between the film thickness and the light wavelength, are discussed. A generalization to the case of multilayered samples is also provided, together with an outlook on the capability of the recently developed micro-focused scanning version of the surf-BLS technique, which opens new opportunities for the imaging of the spatial profile of the acoustic field in acoustic resonators and in artificially patterned metamaterials, such as phononic crystals.

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Section: Opaque Films: Rippling Of the Surface Guided Modes And Relementioning

confidence: 99%

Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review

Carlotti

2018

Applied Sciences

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“…The procedure is described in detail by Every et al 22 and Kotane et al 23 This approach to the present study avoids the necessity of solving the cubic secular equations for the RSAW and p-SAW. In the present study, we make use of just three velocities, the Rayleigh and p-SAW velocities in the [100] and [110] directions and the L velocity in the [100] direction to determine the three elastic constants, and so it does not represent an optimization problem but an exact fit to the three secular equations …”

Section: Obtaining C I From Secular Functions For the Velocities In Smentioning

confidence: 99%

Room temperature elastic properties of Rh-based alloys studied by surface Brillouin scattering

Sumanya

Mathe

Comins

et al. 2014

Journal of Applied Physics

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Articles you may be interested inEffects of alloying elements and temperature on the elastic properties of dilute Ni-base superalloys from firstprinciples calculationsPlatinum metal group alloys are promising materials for use in a new generation of gas turbine engines owing to their excellent high-temperature properties. In the present work, room temperature elastic properties of single crystals of Rh 3 Nb and Rh 3 Zr are investigated. Surface Brillouin scattering spectra for a range of wave vector directions on the (001) surface have been acquired in order to determine the angular variation of the velocities of the Rayleigh and pseudo-surface acoustic waves and that of the longitudinal lateral wave (LLW) threshold within the Lamb shoulder. The elastic stiffness constants C 11 , C 12 , and C 44 of these cubic crystal specimens have been derived using two approaches: the first involving the least-squares fit of the combined measured wave velocity data to calculated values and the second an analytical approach using the Rayleigh velocities in the [100] and [110] directions and LLW velocity in the [100] direction, and extracting the elastic stiffness constants from the secular equations for these velocities. Results from the two methods are in good agreement and are for Rh 3 Nb, C 11 ¼ 368 6 3, C 12 ¼ 186 6 5, and C 44 ¼ 161 6 3 in GPa; and for Rh 3 Zr, C 11 ¼ 329 6 4, C 12 ¼ 185 6 6, and C 44 ¼ 145 6 4 in GPa. V C 2014 AIP Publishing LLC. [http://dx.

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“…The combination of techniques elucidated the effects of the interfaces. Another algorithm for data analysis, different from that outlined above, has also been recently proposed (Every et al, 2010). Both algorithms refer to the types of waves most frequently measured in Brillouin spectroscopy of films or layered structures: surface acoustic wave, or pseudo surface acoustic waves, which essentially travel parallel to the surface, or however have a significant wavevector component parallel to the surface.…”

Section: Brillouin Spectroscopymentioning

confidence: 99%

Acoustic Waves: A Probe for the Elastic Properties of Films

Beghi¹

2011

Acoustic Waves - From Microdevices to Helioseismology

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Characteristic wave speeds in the surface Brillouin scattering measurement of elastic constants of crystals

Cited by 14 publications

References 22 publications

Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review

Elastic Characterization of Transparent and Opaque Films, Multilayers and Acoustic Resonators by Surface Brillouin Scattering: A Review

Room temperature elastic properties of Rh-based alloys studied by surface Brillouin scattering

Acoustic Waves: A Probe for the Elastic Properties of Films

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