Variations in the reflectance of TiN, ZrN and HfN

Perry, A.J.; Georgson, M.; Sproul, William D.

doi:10.1016/0040-6090(88)90007-7

Cited by 84 publications

(31 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The overall shape of the spectra for TiN and TiC is consistent with spectra reported previously in the literature. [9][10][11]15,32,34,[37][38][39][40] In both cases the spectrum is formed by three structures. The lowest binding energy valence band feature is associated to the nonmetal ͑N or C͒ 2s electrons.…”

Section: Resultsmentioning

confidence: 99%

Optical and electronic properties of TiCxNy films

Fuentes

Elizalde

Sanz

2001

Journal of Applied Physics

View full text Add to dashboard Cite

The optical and electronic properties of TiC x N y (xϩyϳ1,0ϽyϽ1) thin films have been investigated by spectroscopic ellipsometry in the 1.5-4.5 eV energy range and by valence band x-ray photoemission spectroscopy as a function of the composition. The dielectric functions measured in the energy range of intraband transitions are analyzed in terms of a Drude-like approximation. Both the free plasma energy and the damping constant are observed to depend on the nitrogen content of the samples, suggesting a certain tunability of the optical and electronic properties of these films. Analysis of the valence band reveals that the C 2p band shifts toward higher binding energies upon an increase of the nitrogen content, in good agreement with the shift observed in the minimum of the optical reflectivity associated with the threshold of the interband transitions. The enhancement of the metallic character of the films as the nitrogen content increases is also evidenced by x-ray photoemission spectroscopy as a continuous intensity growth of the conduction band at the Fermi level.

show abstract

Section: Resultsmentioning

confidence: 99%

Optical and electronic properties of TiCxNy films

Fuentes

Elizalde

Sanz

2001

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

“…15-18 K for NbN and MoN) and they provide conductive diffusion barrier layers for electronics devices. The optical properties lead to coloured coatings for costume jewellery, and they have applications in catalysis [4][5][6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-rich transition metal nitrides

Salamat

Hector

Kroll

et al. 2013

Coordination Chemistry Reviews

131

View full text Add to dashboard Cite

The solid state chemistry leading to the synthesis and characterization of metal nitrides with N:M ratios > 1 is summarized. Studies of these compounds represent an emerging area of research. Most transition metal nitrides have much lower nitrogen contents, and they often form with nonor sub-stoichiometric compositions. These materials are typically metallic with often superconducting properties, and they provide highly refractory, high hardness materials with many technological applications. The higher metal nitrides should achieve formal oxidation states (OS) attaining those found among corresponding oxides, and they are expected to have useful semiconducting properties. Only a very few examples of such high OS nitrogen-rich compounds are known at present. The main group elements typically form covalently bonded nitride ceramics such as Si 3 N 4 , Ge 3 N 4 and Sn 3 N 4 , and the early transition metals Zr and Hf produce Zr 3 N 4 and Hf 3 N 4 . However, the only main example of a highly nitrided transition metal compound known to date is Ta 3 N 5 , that has a formal oxidation state +5 and is a semiconductor with visible light absorption leading to applications as a pigment and in photocatalysis. New synthesis routes are being explored to study the possible formation of other N-rich materials that are predicted to exist by ab initio calculations. There is a useful interplay between theoretical predictions and experimental synthesis studies at ambient and high pressure conditions, as we explore and establish the existence and structure-property relations of these new nitride compounds and polymorphs. Here we review the state of current investigations and indicate possible new directions for further work.[a] European Synchrotron Radiation Facility,

show abstract

“…Ternary nitrides are a relatively unexplored class of materials. They have been known to exhibit a number of important properties such as superconductivity, 23 catalytic activity, [24][25][26][27] thermal emissivity, 28 unusual magnetic behavior [29][30][31][32] and high hardness and strength [33][34][35][36] combined with good thermal and electrical conductivity. Until recently, however, much of the research has been focused on the synthesis and evaluation of the properties of binary nitrides, as higher-order nitrides are often much more difficult to prepare.…”

Section: Introductionmentioning

confidence: 99%