Infrared Absorption Study of HfO2 and HfO2/Si Interface Ranging from 200cm−1 to 2000cm−1

2004 ◽  
Vol 811 ◽  
Author(s):  
Kazuyuki Tomida ◽  
Haruka Shimizu ◽  
Koji Kita ◽  
Kentaro Kyuno ◽  
Akira Toriumi
Keyword(s):  
Absorption Spectra ◽  
Infrared Absorption ◽  
Monoclinic Phase ◽  
Peak Shift ◽  
Amorphous Structure ◽  
Intensity Change ◽  
Ir Absorption ◽  
Ir Absorption Spectra ◽  
Xrd Patterns ◽  
Middle Infrared

ABSTRACTIn this paper, we report infrared absorption studies of HfO2, HfO2/Si interface and Hf(1−x)SixOy. Both HfO2 crystallization and SiO2 formation at the interface can be clearly detected in the absorption spectra in the far and middle infrared regions, respectively. By measuring the intensity change and the peak shift of infrared absorption spectra as functions of annealing temperature and time together with XRD patterns, we discuss a difference of the amorphous structure between HfO2 and SiO2, and also show an evolution of HfO2 crystallization in the monoclinic phase up to 1000 °C. On the other hand, it is shown that the interfacial SiO2 layer is qualitatively similar to the thermally grown SiO2. Furthermore, it is demonstrated that a Si incorporation into HfO2 film significantly changes the IR absorption spectra, and that the Hf(1−x)SixOy film is phase-separated with an appearance of modified monoclinic phase by higher temperature annealing.

Study of the Infrared Absorption Spectra of Some Pyridine Derivatives-Iodine Complexes

1976 ◽  
Vol 30 (2) ◽  
pp. 200-204 ◽  
Author(s):  
F. M. Abdel Kerim ◽  
F. Abou El Fotouh
Keyword(s):  
Complex Formation ◽  
Absorption Spectra ◽  
Infrared Absorption ◽  
Ir Absorption ◽  
Pyridine Derivatives ◽  
Thermodynamic Constants ◽  
Ir Absorption Spectra ◽  
Infrared Absorption Spectra ◽  
The Stability ◽  
Iodine Complexes

The ir absorption spectra of some pyridine derivatives-iodine complexes were measured in the region 400 to 1400 cm−1 and the results are discussed. The effect of complex formation on the intensities of some of the bands was investigated. The thermodynamic constants of these complexes were calculated. It was found that the stability of the complex depends to a large extent on the electronegativity as well as the position of the substituent on the pyridine nucleus. The structures of formed complexes are discussed.

scholarly journals Спектральные и структурные характеристики молибдатов (Lu-=SUB=-1-x-=/SUB=-Eu-=SUB=-x-=/SUB=-)-=SUB=-2-=/SUB=-(MoO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-

2019 ◽  
Vol 61 (4) ◽  
pp. 747
Author(s):  
С.З. Шмурак ◽  
В.В. Кедров ◽  
А.П. Киселев ◽  
Т.Н. Фурсова ◽  
И.И. Зверькова ◽  
...  
Keyword(s):  
Absorption Spectra ◽  
Monoclinic Phase ◽  
Spectral Characteristics ◽  
Ir Absorption ◽  
Orthorhombic Structure ◽  
Ir Absorption Spectra ◽  
Wide Range ◽  
Crystal Phases ◽  
First Time ◽  
Europium Concentration

AbstractThe structure, the photoluminescence, and IR absorption spectra of solid solutions (Lu_1 ‒ _ x Eu_ x )_2(MoO_4)_3 have been studied over a wide range of europium concentrations (0 ≤ x ≤ 1). It has been found that there is a correlation between the structure and the spectral characteristics of these compounds. Three types of crystal phases are sequentially changed as the europium concentration increases. The photoluminescence and IR absorption spectra of the monoclinic phase with space group P 2_1/ a have been studied for the first time. The glow maximum at a resonant excitation of Eu^3+ ions is shown to be observed in the samples with orthorhombic structure Pba 2 at x ~ 0.8. The samples existing in monoclinic P 2_1/ a phase at x ~ 0.2 demonstrate the maximum luminescence intensity upon excitation in the band with the charge transfer.

Near-IR Absorption Spectra for the Buckminsterfullerene Anions: An Experimental and Theoretical Study

1992 ◽  
Author(s):  
Del R. Lawson ◽  
Daniel L. Feldheim ◽  
Colby A. Foss ◽  
Peter K. Dorhoug ◽  
C. M. Elliott
Keyword(s):  
Absorption Spectra ◽  
Theoretical Study ◽  
Ir Absorption ◽  
Near Ir ◽  
Ir Absorption Spectra

scholarly journals Влияние концентрации примеси магния на электрические свойства кристаллов LiNbO-=SUB=-3-=/SUB=-

2021 ◽  
Vol 63 (10) ◽  
pp. 1566
Author(s):  
А.В. Яценко ◽  
С.В. Евдокимов ◽  
В.Ф. Шульгин ◽  
М.Н. Палатников ◽  
Н.В. Сидоров ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Absorption Spectra ◽  
Impurity Content ◽  
Threshold Value ◽  
Ir Absorption ◽  
Temperature Range ◽  
Polar Direction ◽  
Ir Absorption Spectra ◽  
Mg Content

Using the results of studying the electrical conductivity in the temperature range of ~ 295-460 K and the IR absorption spectra of a series of LiNbO3: Mg crystals, it is shown that as the Mg content in the sample increases, the mobility of H+ ions sharply decreases when moving along the polar direction. This effect is most clearly manifested in the samples of LiNbO3: Mg crystals with a high (above threshold value) impurity content.

IR absorption spectra of 1-aryl-3-pyrazolidones

1970 ◽  
Vol 6 (12) ◽  
pp. 1568-1571 ◽  
Author(s):  
B. E. Zaitsev ◽  
N. A. Andronova ◽  
R. B. Zhurin ◽  
L. B. Preobrazhenskaya
Keyword(s):  
Absorption Spectra ◽  
Ir Absorption ◽  
Ir Absorption Spectra
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