Change in chemical bonding state by thermal treatment in MgO-based magnetic tunnel junction observed by angle-resolved hard X-ray photoelectron spectroscopy

2019 ◽  
Vol 125 (20) ◽  
pp. 203903
Author(s):  
Masaaki Niwa ◽  
Akira Yasui ◽  
Eiji Ikenaga ◽  
Hiroaki Honjo ◽  
Shoji Ikeda ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Tunnel Junction ◽  
Chemical Bonding ◽  
Photoelectron Spectroscopy ◽  
Magnetic Tunnel Junction ◽  
X Ray ◽  
Bonding State ◽  
Chemical Bonding State

Chemical bonding state analysis of silicon carbide layers in Mo/SiC/Si multilayer mirrors by soft x-ray emission and absorption spectroscopy

2000 ◽  
Vol 77 (17) ◽  
pp. 2653-2655 ◽  
Author(s):  
Yasuji Muramatsu ◽  
Hisataka Takenaka ◽  
Yuko Ueno ◽  
Eric M. Gullikson ◽  
Rupert C. C. Perera
Keyword(s):  
Silicon Carbide ◽  
Absorption Spectroscopy ◽  
Chemical Bonding ◽  
Multilayer Mirrors ◽  
X Ray ◽  
Bonding State ◽  
Chemical Bonding State ◽  
State Analysis

Fabrication of GaN/Diamond Heterointerface and Interfacial Chemical Bonding State for Highly Efficient Device Design

2021 ◽  
pp. 2104564
Author(s):  
Jianbo Liang ◽  
Ayaka Kobayashi ◽  
Yasuo Shimizu ◽  
Yutaka Ohno ◽  
Seong‐Woo Kim ◽  
...  
Keyword(s):  
Chemical Bonding ◽  
Device Design ◽  
Bonding State ◽  
Highly Efficient ◽  
Chemical Bonding State

scholarly journals Chemical Bonding State of Sulfur in Na2S-SiO2 Glasses

1998 ◽  
Vol 106 (1230) ◽  
pp. 150-154 ◽  
Author(s):  
Taro ASAHI ◽  
Takayuki INO ◽  
Yoshinari MIURA ◽  
Tokuro NANBA ◽  
Hiroshi YAMASHITA
Keyword(s):  
Chemical Bonding ◽  
Bonding State ◽  
Chemical Bonding State

scholarly journals Evaluation of Solar-Driven Photocatalytic Activity of Thermal Treated TiO2 under Various Atmospheres

Nanomaterials ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 163 ◽  
Author(s):  
Reza Katal ◽  
Saeideh Kholghi Eshkalak ◽  
Saeid Masudy-panah ◽  
Mohammadreza Kosari ◽  
Mohsen Saeedikhani ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Thermal Treatment ◽  
Oxygen Vacancy ◽  
Photoelectron Spectroscopy ◽  
Significant Feature ◽  
Positive Role ◽  
Paramagnetic Resonance ◽  
X Ray ◽  
Treatment Conditions ◽  
Treated Sample

In this report, the photocatalytic activity of P25 has been explored and the influence of thermal treatment under various atmospheres (air, vacuum and hydrogen) were discussed. The samples’ characteristics were disclosed by means of various instruments including X-ray diffraction (XRD), Electron paramagnetic resonance (EPR), X-ray photoelectron spectroscopy (XPS) and UV–vis. This study also accentuates various states of the oxygen vacancy density formed inside the samples as well as the colour turning observed in treated P25 under various atmospheres. Produced coloured TiO2 samples were then exploited for their photocatalytic capability concerning photodegradation of methylene blue (MB) using air mass (AM) 1.5 G solar light irradiation. Our findings revealed that exceptional photocatalytic activity of P25 is related to the thermal treatment. Neither oxygen vacancy formation nor photocatalytic activity enhancement was observed in the air-treated sample. H2-treated samples have shown better photoactivity which even could be further improved by optimizing treatment conditions to achieve the advantages of the positive role of oxygen vacancy (O-vacancy at higher concentration than optimum acts as electron trapping sites). The chemical structure and stability of the samples were also studied. There was no sign of deteriorating of O2-vacancies inside the samples after 6 months. High stability of thermal treated samples in terms of both long and short-term time intervals is another significant feature of the produced photocatalyst.

Sign in / Sign up

Export Citation Format

Share Document