Elastic properties of TiN/(VxNb1-x)N superlattices measured by Brillouin scattering

P. B. Mirkarimi; M. Shinn; S. A. Barnett; Sudha Kumar; M. Grimsditch

doi:10.1063/1.350644

Elastic properties of TiN/(V_xNb_1-x)N superlattices measured by Brillouin scattering

P. B. Mirkarimi^*, M. Shinn, S. A. Barnett, Sudha Kumar, M. Grimsditch

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

Brillouin scattering measurements have been carried out on single-crystal lattice-matched TiN/(V_0.6Nb_0.4)N and mismatched TiN/NbN superlattices. Measured surface wave velocities were found to be independent of superlattice wavelength over the entire range investigated, 1.5-30 nm, and were averages of the measured velocities of pure homogeneous TiN, NbN, and (V _0.6Nb_0.4)N. These results indicate that there is no anomaly in the C₄₄ elastic constant. X-ray diffraction results from the superlattices indicated that the average lattice spacing did not vary with wavelength. This is consistent with previous observations where elastic anomalies were related to changes in lattice spacing. The absence of a correlation between the C₄₄ elastic constant and previously reported hardness enhancements indicates that the latter are not caused by anomalies in C₄₄; they could, however, be correlated with other elastic moduli.

Original language	English (US)
Pages (from-to)	4955-4958
Number of pages	4
Journal	Journal of Applied Physics
Volume	71
Issue number	10
DOIs	https://doi.org/10.1063/1.350644
State	Published - 1992

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Physics and Astronomy(all)

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title = "Elastic properties of TiN/(VxNb1-x)N superlattices measured by Brillouin scattering",

abstract = "Brillouin scattering measurements have been carried out on single-crystal lattice-matched TiN/(V0.6Nb0.4)N and mismatched TiN/NbN superlattices. Measured surface wave velocities were found to be independent of superlattice wavelength over the entire range investigated, 1.5-30 nm, and were averages of the measured velocities of pure homogeneous TiN, NbN, and (V 0.6Nb0.4)N. These results indicate that there is no anomaly in the C44 elastic constant. X-ray diffraction results from the superlattices indicated that the average lattice spacing did not vary with wavelength. This is consistent with previous observations where elastic anomalies were related to changes in lattice spacing. The absence of a correlation between the C44 elastic constant and previously reported hardness enhancements indicates that the latter are not caused by anomalies in C44; they could, however, be correlated with other elastic moduli.",

author = "Mirkarimi, {P. B.} and M. Shinn and Barnett, {S. A.} and Sudha Kumar and M. Grimsditch",

year = "1992",

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T1 - Elastic properties of TiN/(VxNb1-x)N superlattices measured by Brillouin scattering

AU - Mirkarimi, P. B.

AU - Shinn, M.

AU - Barnett, S. A.

AU - Kumar, Sudha

AU - Grimsditch, M.

PY - 1992

Y1 - 1992

N2 - Brillouin scattering measurements have been carried out on single-crystal lattice-matched TiN/(V0.6Nb0.4)N and mismatched TiN/NbN superlattices. Measured surface wave velocities were found to be independent of superlattice wavelength over the entire range investigated, 1.5-30 nm, and were averages of the measured velocities of pure homogeneous TiN, NbN, and (V 0.6Nb0.4)N. These results indicate that there is no anomaly in the C44 elastic constant. X-ray diffraction results from the superlattices indicated that the average lattice spacing did not vary with wavelength. This is consistent with previous observations where elastic anomalies were related to changes in lattice spacing. The absence of a correlation between the C44 elastic constant and previously reported hardness enhancements indicates that the latter are not caused by anomalies in C44; they could, however, be correlated with other elastic moduli.

AB - Brillouin scattering measurements have been carried out on single-crystal lattice-matched TiN/(V0.6Nb0.4)N and mismatched TiN/NbN superlattices. Measured surface wave velocities were found to be independent of superlattice wavelength over the entire range investigated, 1.5-30 nm, and were averages of the measured velocities of pure homogeneous TiN, NbN, and (V 0.6Nb0.4)N. These results indicate that there is no anomaly in the C44 elastic constant. X-ray diffraction results from the superlattices indicated that the average lattice spacing did not vary with wavelength. This is consistent with previous observations where elastic anomalies were related to changes in lattice spacing. The absence of a correlation between the C44 elastic constant and previously reported hardness enhancements indicates that the latter are not caused by anomalies in C44; they could, however, be correlated with other elastic moduli.

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Elastic properties of TiN/(V_xNb_1-x)N superlattices measured by Brillouin scattering

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