Effect of Partial Oxygen Pressure on Structural, Electrical, and Magneto transport Properties of Cobalt Doped Indium Oxide Thin Films

2009 ◽  
Vol 1183 ◽  
Author(s):  
Abhijit Ghosh ◽  
N. Ukah ◽  
R K Gupta ◽  
P K Kahol ◽  
K Ghosh
Keyword(s):  
Thin Films ◽  
Transport Properties ◽  
Indium Oxide ◽  
Oxygen Pressure ◽  
Magnetic Semiconductors ◽  
Growth Parameters ◽  
Dilute Magnetic Semiconductors ◽  
Partial Oxygen Pressure ◽  
Magneto Resistance ◽  
Partial Oxygen

AbstractDilute magnetic semiconductors are ferromagnetic semiconductors recently discovered in nitride and oxide semiconductors by incorporating a small percentage of magnetic atoms into the semiconductors host. Recently it is reported that the structural and electrical properties of pure indium oxide can be modified by growth parameters. In this paper we investigate magneto-transport properties of Co-doped In2O3 dilute magnetic semiconductors thin films grown on sapphire and quartz substrates using pulsed laser deposition technique. The effect of partial oxygen pressure on structural, electrical, optical, and magneto-transport properties was discussed in details. The crystallinity of the films largely depends on growth temperature. Magneto-transport properties such as temperature dependent resistivity and magneto-resistance were found to be very sensitive to the micro-structural properties such as crystalinity as well as oxygen defect. The electrical carrier density of the films depends on oxygen pressure and a change of two orders of magnitude is observed. Depending on growth parameters, both positive and negative magneto-resistance is observed. Optical band-gap seems to vary with the growth partial oxygen pressure.

Partial oxygen pressure effects on the morphology of Y‐Ba‐Cu‐O thin films in laser deposition process

1990 ◽  
Vol 68 (1) ◽  
pp. 374-376 ◽  
Author(s):  
Takashi Hase ◽  
Hirohiko Izumi ◽  
Katsumi Ohata ◽  
Katsumi Suzuki ◽  
Tadataka Morishita ◽  
...  
Keyword(s):  
Thin Films ◽  
Oxygen Pressure ◽  
Deposition Process ◽  
Partial Oxygen Pressure ◽  
Pressure Effects ◽  
Laser Deposition ◽  
Partial Oxygen

Interaction of human hemoglobin with oxygen in the presence of benzene and use of computer for construction of saturation curves

1986 ◽  
Vol 51 (8) ◽  
pp. 1795-1801
Author(s):  
Hana Hájková ◽  
Zdeněk Pavlíček ◽  
Vítěz Kalous
Keyword(s):  
Oxygen Saturation ◽  
Oxygen Pressure ◽  
Time Profile ◽  
Partial Oxygen Pressure ◽  
Human Hemoglobin ◽  
Allosteric Interaction ◽  
Partial Oxygen

The time profile of changes in the oxygen saturation curves of human hemoglobin in the presence of benzene was investigated. The partial oxygen pressure p50, necessary for a half saturation, decreases during the first 3.5 h of interaction of hemoglobin with benzene and did not change afterwards. The character of changes in Hill's coefficient was similar. The oxygen saturation was modeled both for hemoglobin alone and, using MWC as a model of allosteric interaction, also for hemoglobin and benzene in a computer.

scholarly journals Mismatch between Tissue Partial Oxygen Pressure and Near-Infrared Spectroscopy Neuromonitoring of Tissue Respiration in Acute Brain Trauma: The Rationale for Implementing a Multimodal Monitoring Strategy

2021 ◽  
Vol 22 (3) ◽  
pp. 1122
Author(s):  
Mario Forcione ◽  
Mario Ganau ◽  
Lara Prisco ◽  
Antonio Maria Chiarelli ◽  
Andrea Bellelli ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
Near Infrared Spectroscopy ◽  
Oxygen Pressure ◽  
Near Infrared ◽  
Optical Signal ◽  
Brain Trauma ◽  
Partial Oxygen Pressure ◽  
Tissue Respiration ◽  
The Brain ◽  
Partial Oxygen

The brain tissue partial oxygen pressure (PbtO2) and near-infrared spectroscopy (NIRS) neuromonitoring are frequently compared in the management of acute moderate and severe traumatic brain injury patients; however, the relationship between their respective output parameters flows from the complex pathogenesis of tissue respiration after brain trauma. NIRS neuromonitoring overcomes certain limitations related to the heterogeneity of the pathology across the brain that cannot be adequately addressed by local-sample invasive neuromonitoring (e.g., PbtO2 neuromonitoring, microdialysis), and it allows clinicians to assess parameters that cannot otherwise be scanned. The anatomical co-registration of an NIRS signal with axial imaging (e.g., computerized tomography scan) enhances the optical signal, which can be changed by the anatomy of the lesions and the significance of the radiological assessment. These arguments led us to conclude that rather than aiming to substitute PbtO2 with tissue saturation, multiple types of NIRS should be included via multimodal systemic- and neuro-monitoring, whose values then are incorporated into biosignatures linked to patient status and prognosis. Discussion on the abnormalities in tissue respiration due to brain trauma and how they affect the PbtO2 and NIRS neuromonitoring is given.

Synthesis of monophase HgBa2CuO4+δ under controlled partial oxygen pressure

1995 ◽  
Vol 255 (3-4) ◽  
pp. 173-179 ◽  
Author(s):  
V.A. Alyoshin ◽  
D.A. Mikhailova ◽  
E.V. Antipov
Keyword(s):  
Oxygen Pressure ◽  
Partial Oxygen Pressure ◽  
Partial Oxygen

scholarly journals Correlation Between The Inspired Fraction Of Oxygen, Maternal Partial Oxygen Pressure, And Fetal Partial Oxygen Pressure During Cesarean Section Of Normal Pregnancies

2009 ◽  
Vol 59 (4) ◽  
pp. 452-460 ◽  
Author(s):  
Carlos Henrique Viana de Castro ◽  
Marcos Guilherme Cunha Cruvinel ◽  
Fabiano Soares Carneiro ◽  
Yerkes Pereira Silva ◽  
Antônio Carlos Vieira Cabral ◽  
...  
Keyword(s):  
Cesarean Section ◽  
Oxygen Pressure ◽  
Partial Oxygen Pressure ◽  
Partial Oxygen
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