Ferroelastic relaxation at 20 GHz evidenced ...
Document type :
Compte-rendu et recension critique d'ouvrage
DOI :
Title :
Ferroelastic relaxation at 20 GHz evidenced by large frequency range picosecond acoustics
Author(s) :
Devos, Arnaud [Auteur]
Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Casset, F. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives [CEA]
Le Rhun, G. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Emery, P. [Auteur]
Fanget, S. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Defay, E. [Auteur]
Department of Materials Science and Metallurgy [Cambridge University] [DMSM]
Luxembourg Institute of Science and Technology [LIST]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]

Physique - IEMN [PHYSIQUE - IEMN]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Casset, F. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives [CEA]
Le Rhun, G. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Emery, P. [Auteur]
Fanget, S. [Auteur]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Defay, E. [Auteur]
Department of Materials Science and Metallurgy [Cambridge University] [DMSM]
Luxembourg Institute of Science and Technology [LIST]
Commissariat à l'énergie atomique et aux énergies alternatives - Laboratoire d'Electronique et de Technologie de l'Information [CEA-LETI]
Journal title :
Applied Physics Letters
Pages :
-
Publisher :
American Institute of Physics
Publication date :
2018
ISSN :
0003-6951
HAL domain(s) :
Sciences de l'ingénieur [physics]
English abstract : [en]
We present a method to perform elastic measurements on a thin-film as a function of frequency between a few GHz and a few hundred GHz. The technique is mainly based on Picosecond Acoustics (PA), which is an ultrafast optical ...
Show more >We present a method to perform elastic measurements on a thin-film as a function of frequency between a few GHz and a few hundred GHz. The technique is mainly based on Picosecond Acoustics (PA), which is an ultrafast optical technique that realizes pulse-echo measurements in the hypersonic range. Here, we combine gold layers serving as transducers and several opto-acoustic detection mechanisms to extend the PA technique to the lowest accessible frequencies (a few GHz) up to hundreds of GHz. We can therefore use the same technique on the same material to explore its elastic properties at a certain frequency over a very large frequency range. We have then applied this technique to explore the elastic properties of a lead zirconate titanate thin film from 3 to 80 GHz. We report a 9% increase in the longitudinal sound velocity above 20 GHz, which corresponds to a 19% increase in the C-33 elastic modulus. We interpret such an observation as a direct evidence of ferroelastic domain wall relaxation. Published by AIP Publishing.Show less >
Show more >We present a method to perform elastic measurements on a thin-film as a function of frequency between a few GHz and a few hundred GHz. The technique is mainly based on Picosecond Acoustics (PA), which is an ultrafast optical technique that realizes pulse-echo measurements in the hypersonic range. Here, we combine gold layers serving as transducers and several opto-acoustic detection mechanisms to extend the PA technique to the lowest accessible frequencies (a few GHz) up to hundreds of GHz. We can therefore use the same technique on the same material to explore its elastic properties at a certain frequency over a very large frequency range. We have then applied this technique to explore the elastic properties of a lead zirconate titanate thin film from 3 to 80 GHz. We report a 9% increase in the longitudinal sound velocity above 20 GHz, which corresponds to a 19% increase in the C-33 elastic modulus. We interpret such an observation as a direct evidence of ferroelastic domain wall relaxation. Published by AIP Publishing.Show less >
Language :
Anglais
Popular science :
Non
Source :
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