Spectroscopic ellipsometry study on the dielectric function of bulk Ti2AlN, Ti2AlC, Nb2AlC, "(Ti0.5 ,Nb0.5)2AlC, and Ti3GeC2 MAX-phases

13Citations
Citations of this article
37Readers
Mendeley users who have this article in their library.
Get full text

Abstract

The averaged complex dielectric function ε= ε(2;εε⊥+ε1) /3 of polycrystalline Ti 2AlN, Ti2AlC, Nb2AlC,(Ti0.5,Nb0.5) 2AlC, and Ti3GeC2 was determined by spectroscopic ellipsometry covering the mid infrared to the ultraviolet spectral range. The dielectric functions ε⊥; and ε∥ correspond to the perpendicular and parallel dielectric tensor components relative to the crystallographic c-axis of these hexagonal compounds. The optical response is represented by a dispersion model with Drude- Lorentz and critical point contributions. In the low energy range the electrical resistivity is obtained from the Drude term and ranges from 0.48 μωm for Ti3GeC2 to 1.59 μΩm for (Ti0.5,Nb0.5)2AlC. Furthermore, several compositional dependent interband electronic transitions can be identified. For the most important ones, Im(ε)shows maxima at: 0.78, 1.23, 2.04, 2.48, and 3.78 eV for Ti2AlN; 0.38, 1.8, 2.6, and 3.64 eV for Ti 2AlC; 0.3, 0.92, and 2.8 eV in Nb2AlC; 0.45, 0.98, and 2.58 eV in (Ti0.5,Nb0.5)2AlC; and 0.8, 1.85, 2.25, and 3.02 eV in Ti3GeC2. © 2011 American Institute of Physics.

References Powered by Scopus

Get full text
571Citations
148Readers
Get full text
285Citations
121Readers
Get full text

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Cite

CITATION STYLE

APA

Mendoza-Galván, A., Rybka, M., Järrendahl, K., Arwin, H., Magnuson, M., Hultman, L., & Barsoum, M. W. (2011). Spectroscopic ellipsometry study on the dielectric function of bulk Ti2AlN, Ti2AlC, Nb2AlC, "(Ti0.5 ,Nb0.5)2AlC, and Ti3GeC2 MAX-phases. Journal of Applied Physics, 109(1). https://doi.org/10.1063/1.3525648

Readers over time

‘11‘12‘13‘14‘15‘16‘17‘18‘19‘20‘21‘23‘24‘2502468

Readers' Seniority

Tooltip

PhD / Post grad / Masters / Doc 19

68%

Researcher 5

18%

Professor / Associate Prof. 4

14%

Readers' Discipline

Tooltip

Materials Science 16

57%

Engineering 6

21%

Physics and Astronomy 5

18%

Chemistry 1

4%

Save time finding and organizing research with Mendeley

Sign up for free
0