Sound Velocity and Absorption Measurements under High Pressure Using Picosecond Ultrasonics in a Diamond Anvil Cell: Application to the Stability Study of AlPdMn

Decremps, F.; Belliard, Laurent; Perrin, Bernard; Gauthier, Michel

doi:10.1103/physrevlett.100.035502

Cited by 57 publications

(51 citation statements)

References 27 publications

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“…This fact in combination with the opportunities to monitor multiple different BS processes/frequencies simultaneously would be advantageous in studying the dispersion of the sound velocity and attenuation in many materials. It is worth noting here that the applications of usual TDBS schemes for studying acoustic wave attenuation are documented for a variety of the media [36][37][38][39][40][41][42][43][44][45][46]. The opportunity to monitor in a single measurement the acoustic phonons propagating in different directions could be attractive for revealing the elastic/inelastic anisotropy of materials, including one which could be caused by nonisotropic loading or by the residual stress.…”

Section: Discussionmentioning

confidence: 99%

“…TDBS assisted by diffraction gratings could be also advantageous in several applications with limited optical access to the samples [12,40,47]. It could provide the opportunity to monitor multiple BS processes/frequencies even with incident and the detected/scattered light propagating collinearly (for example, in the case of the probe light incident normally on the grating and the detection of either reflected or transmitted light in the directions also normal to the grating surfaces).…”

Section: Discussionmentioning

confidence: 99%

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Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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Absorption of ultrashort laser pulses in a metallic grating deposited on a transparent sample launches coherent compression/dilatation acoustic pulses in directions of different orders of acoustic diffraction. Their propagation is detected by delayed laser pulses, which are also diffracted by the metallic grating, through the measurement of the transient intensity change of the first-order diffracted light. The obtained data contain multiple frequency components, which are interpreted by considering all possible angles for the Brillouin scattering of light achieved through multiplexing of the propagation directions of light and coherent sound by the metallic grating. The emitted acoustic field can be equivalently presented as a superposition of plane inhomogeneous acoustic waves, which constitute an acoustic diffraction grating for the probe light. Thus the obtained results can also be interpreted as a consequence of probe light diffraction by both metallic and acoustic gratings. The realized scheme of time-domain Brillouin scattering with metallic gratings operating in reflection mode provides access to wide range of acoustic frequencies from minimal to maximal possible values in a single experimental optical configuration for the directions of probe light incidence and scattered light detection. This is achieved by monitoring the backward and forward Brillouin scattering processes in parallel. Potential applications include measurements of the acoustic dispersion, simultaneous determination of sound velocity and optical refractive index, and evaluation of samples with a single direction of possible optical access.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Time-domain Brillouin scattering assisted by diffraction gratings

et al. 2018

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“…The detection is carried out by a stabilized Michelson interferometer that allows the determination of the reflectivity imaginary part change (at high pressure, interferometric measurements are mandatory to efficiently detect acoustic pulses with a low-frequency spectrum due to sound attenuation). The possibilities of this setup were tested by performing measurements of the elastic properties of the quasicrystal AlPdMn [86]. Two echoes corresponding to longitudinal acoustic waves were recorded at each pressure, through the relative variation of the reflectance imaginary part.…”

Section: General Presentationmentioning

confidence: 99%

Optical Spectroscopy Methods and High‐Pressure–High‐Temperature Studies

Polian

Simon

Pagès³

2010

Thermodynamic Properties of Solids

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This chapter aims to show how optical spectroscopies contribute to the study of vibrational properties under extreme conditions. Now, what do we mean by extreme conditions? We can take it in the other way and mention that ambient conditions have nothing more special as to permit life on earth -that is already not bad! From the point of view of physics, no particular property occurs at ambient conditions. On the contrary, most of the matter in the universe is under extreme pressure (P) and temperature (T), as it is in planets, stars, and more exotic objects. Studies at high pressure and high temperature are hence only the study of matter in its normal conditions. The reason why geoscientists are much interested in such studies is self-explanatory, but other fields are widely studied. The application of high pressure and high temperature enables to explore the repulsive part of the potential energy (fundamental physics), to provoke phase transformations thereby leading to new structures eventually metastable at ambient conditions (materials sciences), to orient chemical reactions in requested directions (chemistry), and even to crystallize proteins, that otherwise would not happen by using other techniques (biology). Another interest to work under variable conditions is that, obviously, more insight is given into the considered phenomenon, in that the pressure and/or temperature derivatives of the phenomenon become available, thus offering a more complete picture to achieve optimum understanding and/or modeling.There are mainly five experimental methods to probe the vibrational properties of matter: optical spectroscopies (of main interest here), ultrasonics (US), inelastic neutron scattering (INS, cf. Chapter 3), more recently inelastic X-ray scattering (IXS, cf. Chapter 4) -that was made possible due to the introduction of third generation synchrotron radiation facilities -and picosecond (PS) acoustics.INS and IXS are used to determine the dispersion of vibration modes, that is, acoustical as well as optical ones, over the whole Brillouin zone (BZ). The most stringent limitations are the needed sources (national-size ones, i.e., a nuclear reactor for INS and a monochromatized X-ray beam as delivered by a synchrotron for IXS), and a limitation to small momentum transfer (q < 0.1q BZB , where q is the magnitude of the wavevector and BZB is the BZ boundary). An additional limitation for INS is

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“…Jacobsen et al, 2004). Only very recently, measurements of acoustic echoes in samples compressed in diamond anvil cells became possible thanks to the developments in time-resolved pump-probe techniques (laser ultrasonics), both in the nanosecond time scale (Chigarev et al, 2008) and in the picosecond time scale (Decremps et al, 2008). Measurements on iron provided V P and V S up to 23 GPa (Chigarev et al, 2008) and of the only V P up to 152 GPa (Decremps et al, 2014).…”

Section: Experimental Techniques For Sound Velocity Determination Undmentioning

confidence: 99%

Sound velocity of hcp-Fe at high pressure: experimental constraints, extrapolations and comparison with seismic models

Antonangeli

Ohtani

2015

Prog. in Earth and Planet. Sci.

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Determining the sound velocity of iron under extreme thermodynamic conditions is essential for a proper interpretation of seismic observations of the Earth's core but is experimentally challenging. Here, we review techniques and methodologies used to measure sound velocities in metals at megabar pressures, with specific focus on the compressional sound velocity of hexagonal close-packed iron. A critical comparison of literature results, coherently analyzed using consistent metrology (pressure scale, equation of state), allows us to propose reference relations for the pressure and density dependence of the compressional velocity of hexagonal close-packed iron at ambient temperature. This provides a key base line upon which to add complexity, including high-temperature effects, pre-melting effects, effects of nickel and/or light element incorporation, necessary for an accurate comparison with seismic models, and ultimately to constrain Earth's inner core composition.

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Sound Velocity and Absorption Measurements under High Pressure Using Picosecond Ultrasonics in a Diamond Anvil Cell: Application to the Stability Study of AlPdMn

Cited by 57 publications

References 27 publications

Time-domain Brillouin scattering assisted by diffraction gratings

Time-domain Brillouin scattering assisted by diffraction gratings

Optical Spectroscopy Methods and High‐Pressure–High‐Temperature Studies

Sound velocity of hcp-Fe at high pressure: experimental constraints, extrapolations and comparison with seismic models

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