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On Raman scattering from selected M2AC compounds

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Abstract

We report on the one-phonon Raman scattering spectra from the following M2AC MAX-phase ternary carbides: Ti2AlC, V2AlC, Cr2AlC, Nb2AlC, Ta2AlC, Ti2InC, Hf2InC, V2GeC, Cr2GeC, V2AsC, and Nb2AsC. We also report the results of calculations of the Γ-point, Raman-active phonon energies for these phases based on density functional theoretical simulations, including the effect of the k-point sampling on the convergence of phonon energies. Good agreement between all measured and calculated Γ-point Raman-active optical phonon energies is obtained.

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FIG. 1
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TABLE I.
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Acknowledgments

We thank Dr. Alexander Mavromaras and Dr. Paul Saxe of Materials Design for helpful discussions. We acknowledge the National Science Foundation (NSF) for support under DMR-0503711. Oren D. Leaffer also acknowledges support under a Graduate Assistantship in Areas of National Need (GAANN) grant in Materials at Drexel University from the United States Department of Education under Award No. P200A060117.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Drexel University, Philadelphia, Pennsylvania, 19104, USA

    Oren D. Leaffer, Surojit Gupta, Michel W. Barsoum & Jonathan E. Spanier

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  1. Oren D. Leaffer
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  2. Surojit Gupta
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  3. Michel W. Barsoum
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  4. Jonathan E. Spanier
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Correspondence to Jonathan E. Spanier.

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Leaffer, O.D., Gupta, S., Barsoum, M.W. et al. On Raman scattering from selected M2AC compounds. Journal of Materials Research 22, 2651–2654 (2007). https://doi.org/10.1557/JMR.2007.0376

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