Fourier-Transform Infrared Absorption Spectroscopy of Chromium Nitride Thin Film

Shirahata, Jun; Ohori, Tetsutaro; Asami, Hiroki; Suzuki, Tsuneo; Nakayama, Tadachika; Suematsu, Hisayuki; Niihara, Koichi

doi:10.7567/jjap.50.01be03

Cited by 2 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results are slightly different from the previously published reflectance data, which show a broad phonon mode at around 52 meV [19]. The small difference in the position of the phonon mode could be attributed to the thickness, the composition, and the strain of the thin films used in the previous measurements, which affect the phonon mode position [20,26].…”

Section: A Optical Spectrum At Ambient Conditionscontrasting

confidence: 99%

Infrared study of the magnetostructural phase transition in correlated CrN

et al. 2016

View full text Add to dashboard Cite

We report on the pressure and temperature dependence of the electronic and vibrational properties of polycrystalline CrN studied by optical transmission and reflection measurements over the frequency range 0.012-2.48 eV. The optical conductivity spectrum of CrN at ambient conditions shows a phonon mode at ≈55 meV with a shoulder at ≈69 meV, a pronounced midinfrared absorption band centered at 123 ± 2 meV, and a high-energy absorption band at ≈1.5 eV. The absorption bands are discussed in terms of the charge-transfer insulator picture. Following the reflectance spectrum with increasing pressure, the activation of an additional phonon mode above 0.6 GPa indicates the occurrence of a pressure-induced structural phase transition. Furthermore, the absorption spectrum exhibits significant changes in the far-infrared range with decreasing temperature: The phonon mode shows a sudden broadening followed by a splitting below 270 K. These changes observed under pressure or while cooling down can be associated with the magnetostructural phase transition reported previously.

show abstract

Section: A Optical Spectrum At Ambient Conditionscontrasting

confidence: 99%

Infrared study of the magnetostructural phase transition in correlated CrN

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Previously, CrN and Cr(N,O) thin films were synthesized by PLD 21,22) or RF reactive unbalanced magnetron sputtering [23][24][25] as hard coatings for cutting tools. Moreover, we have proposed the dissolution of third elements at the Cr sites of CrN and Cr(N,O) in order to improve the hardness of these films 26) and synthesized (Cr,Al)N, 27) Cr-Al-N-O, 28) (Cr,Mg)(N,O), 29) Cr-Zn-N-O, 30) and Cr-Si-N 31) thin films by PLD.…”

Section: Experimental Methodsmentioning

confidence: 99%

Changes in the electric resistivity of CrN subsequent to oxygen dissolution

Nagasawa

Suzuki

Sato

et al. 2016

Jpn. J. Appl. Phys.

Self Cite

View full text Add to dashboard Cite

Single-phase epitaxial chromium oxynitride thin films containing 11 to 45 mol % oxygen were successfully synthesized on MgO(100) substrates by pulsed laser deposition at 773 K while controlling the ambient oxygen partial pressure. The film compositions were subsequently analyzed by Rutherford backscattering spectroscopy and electron energy-loss spectroscopy, while crystal phases were identified by X-ray diffractometry using the Bragg–Brentano and glancing incidence configurations and by in-plane φ scanning. The microstructures were observed by transmission electron microscopy. The electrical resistance of the films was determined by either the two- or four-probe method. The Cr(N,O) thin film having 11 mol % oxygen exhibited a metallic temperature dependence. In contrast, the films containing oxygen of 13 mol % or higher showed a semiconducting (or insulating) temperature dependence. This resistivity change is believed to result from enhanced electron correlation brought about by increases in oxygen content, sufficient to transform the Cr(N,O) thin film into a Mott insulator.

show abstract

Fourier-Transform Infrared Absorption Spectroscopy of Chromium Nitride Thin Film

Cited by 2 publications

References 11 publications

Infrared study of the magnetostructural phase transition in correlated CrN

Infrared study of the magnetostructural phase transition in correlated CrN

Changes in the electric resistivity of CrN subsequent to oxygen dissolution

Contact Info

Product

Resources

About