Elastic constants of single-crystal Ti Nx (001) (0.67≤x≤1.0) determined as a function of x by picosecond ultrasonic measurements

Taeyoon Lee, K. Ohmori, C. S. Shin, David G. Cahill, I. Petrov, J. E. Greene

Research output: Contribution to journalArticle

68 Citations (Scopus)

Abstract

The elastic constants c11 and c44 of single-crystal NaCl-structure δ-TiNx (001) layers, with x ranging from 0.67 to 1.0, were determined using sound velocity measurements. Picosecond ultrasonic optical pump/probe techniques were employed to generate and detect longitudinal sound waves and surface acoustic waves (SAW) in order to obtain c11 (x) and c44 (x), respectively. SAW generation was achieved by depositing a periodic series of Al bars on the Ti Nx (001) layers to spatially modulate the surface reflectivity. c11 and c44 were found to decrease continuously from 626 and 156 GPa with x=1 to 439 and 92 GPa with x=0.67. The Voit-Reuss-Hill average aggregate elastic moduli EVRH (x) obtained from our measured c11 (x) and c44 (x) values are in good agreement with previous Ti Nx (001) nanoindentation results.

Original languageEnglish
Article number144106
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume71
Issue number14
DOIs
Publication statusPublished - 2005 Dec 15

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Ultrasonic measurement
Elastic constants
elastic properties
ultrasonics
Acoustic waves
Single crystals
Surface waves
single crystals
Acoustic variables measurement
acoustics
wave generation
Acoustic wave velocity
Nanoindentation
nanoindentation
acoustic velocity
velocity measurement
sound waves
Velocity measurement
modulus of elasticity
Crystal structure

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

Cite this

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title = "Elastic constants of single-crystal Ti Nx (001) (0.67≤x≤1.0) determined as a function of x by picosecond ultrasonic measurements",
abstract = "The elastic constants c11 and c44 of single-crystal NaCl-structure δ-TiNx (001) layers, with x ranging from 0.67 to 1.0, were determined using sound velocity measurements. Picosecond ultrasonic optical pump/probe techniques were employed to generate and detect longitudinal sound waves and surface acoustic waves (SAW) in order to obtain c11 (x) and c44 (x), respectively. SAW generation was achieved by depositing a periodic series of Al bars on the Ti Nx (001) layers to spatially modulate the surface reflectivity. c11 and c44 were found to decrease continuously from 626 and 156 GPa with x=1 to 439 and 92 GPa with x=0.67. The Voit-Reuss-Hill average aggregate elastic moduli EVRH (x) obtained from our measured c11 (x) and c44 (x) values are in good agreement with previous Ti Nx (001) nanoindentation results.",
author = "Taeyoon Lee and K. Ohmori and Shin, {C. S.} and Cahill, {David G.} and I. Petrov and Greene, {J. E.}",
year = "2005",
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language = "English",
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journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
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Elastic constants of single-crystal Ti Nx (001) (0.67≤x≤1.0) determined as a function of x by picosecond ultrasonic measurements. / Lee, Taeyoon; Ohmori, K.; Shin, C. S.; Cahill, David G.; Petrov, I.; Greene, J. E.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 71, No. 14, 144106, 15.12.2005.

Research output: Contribution to journalArticle

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T1 - Elastic constants of single-crystal Ti Nx (001) (0.67≤x≤1.0) determined as a function of x by picosecond ultrasonic measurements

AU - Lee, Taeyoon

AU - Ohmori, K.

AU - Shin, C. S.

AU - Cahill, David G.

AU - Petrov, I.

AU - Greene, J. E.

PY - 2005/12/15

Y1 - 2005/12/15

N2 - The elastic constants c11 and c44 of single-crystal NaCl-structure δ-TiNx (001) layers, with x ranging from 0.67 to 1.0, were determined using sound velocity measurements. Picosecond ultrasonic optical pump/probe techniques were employed to generate and detect longitudinal sound waves and surface acoustic waves (SAW) in order to obtain c11 (x) and c44 (x), respectively. SAW generation was achieved by depositing a periodic series of Al bars on the Ti Nx (001) layers to spatially modulate the surface reflectivity. c11 and c44 were found to decrease continuously from 626 and 156 GPa with x=1 to 439 and 92 GPa with x=0.67. The Voit-Reuss-Hill average aggregate elastic moduli EVRH (x) obtained from our measured c11 (x) and c44 (x) values are in good agreement with previous Ti Nx (001) nanoindentation results.

AB - The elastic constants c11 and c44 of single-crystal NaCl-structure δ-TiNx (001) layers, with x ranging from 0.67 to 1.0, were determined using sound velocity measurements. Picosecond ultrasonic optical pump/probe techniques were employed to generate and detect longitudinal sound waves and surface acoustic waves (SAW) in order to obtain c11 (x) and c44 (x), respectively. SAW generation was achieved by depositing a periodic series of Al bars on the Ti Nx (001) layers to spatially modulate the surface reflectivity. c11 and c44 were found to decrease continuously from 626 and 156 GPa with x=1 to 439 and 92 GPa with x=0.67. The Voit-Reuss-Hill average aggregate elastic moduli EVRH (x) obtained from our measured c11 (x) and c44 (x) values are in good agreement with previous Ti Nx (001) nanoindentation results.

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