Electronic, thermal, and elastic properties of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ti</mml:mi></mml:mrow><mml:mn>3</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Si</mml:mi></mml:mrow><mml:mrow><mml:mn>1</mml:mn><mml:mo>−</mml:mo><mml:mi>x</mml:mi></mml:mrow></mml:msub><mml:msub><mml:mrow><mml:mi mathvariant="normal">Ge</mml:mi></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mi mathva

Finkel, Peter; Seaman, Brian; Harrell, K.; Palma, Julio L.; Hettinger, J. D.; Lofland, S. E.; Ganguly, A.; Barsoum, Michel W.; Sun, Zhimei; Li, Sa; Ahuja, Rajeev

doi:10.1103/physrevb.70.085104

Cited by 91 publications

(48 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Carrier concentrations are of the order of 10 27 m −3 with equal contributions of electrons and holes, i.e., they are compensated conductors. 2,4,6 As seen in Table I, the resistivity values obtained in this work, through the Drude term, are within a factor of 2 to 3.5 of those reported for bulk materials measured using a four-probe technique. When the two sets of FIG.…”

Section: B Electrical Resistivitysupporting

confidence: 56%

“…In the scientific literature there are many reports on the processing of bulk MAX-phases as well as on their physical properties such as electrical, thermal, and elastic. [1][2][3][4][5][6] Also, the electronic properties of these materials have been studied both theoretically and experimentally. [4][5][6][7][8][9] For MAX-phases in thin film form, the processing and physical properties have been recently reviewed.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6] Also, the electronic properties of these materials have been studied both theoretically and experimentally. [4][5][6][7][8][9] For MAX-phases in thin film form, the processing and physical properties have been recently reviewed. 10 Because the MAX-phases crystallize in a hexagonal structure the anisotropy of its conductivity is of great interest but it has been difficult to experimentally resolve this issue.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

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

Mendoza-Galván¹,

Rybka²,

Järrendahl³

et al. 2011

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

The averaged complex dielectric function = ͑2 Ќ + ʈ ͒ / 3 of polycrystalline Ti 2 AlN, Ti 2 AlC, Nb 2 AlC, ͑Ti 0.5 ,Nb 0.5 ͒ 2 AlC, and Ti 3 GeC 2 was determined by spectroscopic ellipsometry covering the mid infrared to the ultraviolet spectral range. The dielectric functions Ќ and ʈ 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 DrudeLorentz and critical point contributions. In the low energy range the electrical resistivity is obtained from the Drude term and ranges from 0.48 ⍀ m for Ti 3 GeC 2 to 1.59 ⍀ m for ͑Ti 0.5 ,Nb 0.5 ͒ 2 AlC. Furthermore, several compositional dependent interband electronic transitions can be identified. For the most important ones, Im͑ ͒ shows maxima at: 0.78, 1.23, 2.04, 2.48, and 3.78 eV for Ti 2 AlN; 0.38, 1.8, 2.6, and 3.64 eV for Ti 2 AlC; 0.3, 0.92, and 2.8 eV in Nb 2 AlC; 0.45, 0.98, and 2.58 eV in ͑Ti 0.5 ,Nb 0.5 ͒ 2 AlC; and 0.8, 1.85, 2.25, and 3.02 eV in Ti 3 GeC 2 .

show abstract

Section: B Electrical Resistivitysupporting

confidence: 56%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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

Mendoza-Galván¹,

Rybka²,

Järrendahl³

et al. 2011

Journal of Applied Physics

Self Cite

View full text Add to dashboard Cite

show abstract

“…Interestingly, with a few possible exceptions [30,31,32], solid solution hardening of the MAX phases does in general not appear to be pronounced. This issue is particularly evident in the Ti 3 AC 2 systems with A = Si, Ge, Al, Sn, where numerous investigations [18,19,33,34,35] have demonstrated that solid solution hardening is not operative in these systems, while one study claims the opposite [32]. To advance the field, there is therefore a strong need for clear experimental evidence of solid-solution engineering to steer inherent materials properties.…”

Section: Introductionmentioning

confidence: 99%

Tailoring of the thermal expansion of Cr2(Alx,Ge1−x)C phases

Cabioc’h¹,

Eklund²,

Mauchamp³

et al. 2013

Journal of the European Ceramic Society

107

View full text Add to dashboard Cite

show abstract

“…It is this rattling effect that is believed to be responsible for the low phonon conductivities of the MAX phases comprised of elements heavier than Al, despite their high specific stiffness values and high Debye temperatures. 1, [7][8] In a first principles study of the thermal properties of the 312 MAX phases Ti 3 SiC 2 , Ti 3 AlC 2 , and Ti 3 GeC 2 by Togo et al in 2010, it was found that the unusual low-frequency phonon states are likely due to the high-amplitude atomic vibrations of the A elements, Si, Al and Ge respectively. 9 It was also found that the corresponding atomic motions for these lowfrequency bands at the K point in the Brillouin zone can be represented as rotations of the Agroup atoms around their average positions.…”

Section: -2mentioning

confidence: 99%

Neutron diffraction measurements and first-principles study of thermal motion of atoms in selectMn+1AXnand binaryM

et al. 2012

View full text Add to dashboard Cite

Herein, we compare the thermal vibrations of atoms in select ternary carbides with the formula M n+1 AX n ("MAX phases", M = Ti, Cr; A = Al, Si, Ge; X = C, N) as determined from first principles phonon calculations to those obtained from hightemperature neutron powder diffraction studies. The transition metal carbides TiC, TaC, and WC are also studied to test our methodology on simpler carbides. Good qualitative and quantitative agreement is found between predicted and experimental values for the binary carbides. For all the MAX phases studied -Ti 3 SiC 2, Ti 3 GeC 2 , Ti 2 AlN, Cr 2 GeC and Ti 4 AlN 3 -density functional theory calculations predict that the A element vibrates with the highest amplitude and does so anisotropically with a higher amplitude within the basal plane, which is in line with earlier results from high-temperature neutron diffraction studies. In some cases, there are quantitative differences in the absolute values between the theoretical and experimental atomic displacement parameters, such as reversal of anisotropy or a systematic offset of temperature-dependent atomic displacement parameters. The mode-dependent Grüneisen parameters are also computed to explore the anharmonicity in the system.

show abstract

Electronic, thermal, and elastic properties ofTi3Si1−xGex

Cited by 91 publications

References 20 publications

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

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

Tailoring of the thermal expansion of Cr2(Alx,Ge1−x)C phases

Neutron diffraction measurements and first-principles study of thermal motion of atoms in selectMn+1AXnand binaryM

Contact Info

Product

Resources

About