scholarly journals Antiferromagnetic coupling between surface and bulk magnetization and anomalous magnetic transport in electro-deposited cobalt film

RSC Advances ◽  
2016 ◽  
Vol 6 (41) ◽  
pp. 34641-34649 ◽  
Author(s):  
Surendra Singh ◽  
C. L. Prajapat ◽  
D. Bhattacharya ◽  
S. K. Ghosh ◽  
M. R. Gonal ◽  
...  
Keyword(s):  
Antiferromagnetic Coupling ◽  
Depth Profiles ◽  
Cobalt Film ◽  
Morphology And Structure ◽  
Bulk Magnetization ◽  
Magnetic Transport

Correlation of morphology and structure and magnetization depth profiles of Co films grown by two different techniques, e.g. electrodeposition (S1) and sputtering (S2).

Preparation of Backthinned Ceramic Specimens

1985 ◽  
Vol 43 ◽  
pp. 182-183
Author(s):  
A. T. Fisher ◽  
P. Angelini
Keyword(s):  
Electron Microscopy ◽  
Analytical Electron Microscopy ◽  
Vacuum System ◽  
Back Surface ◽  
Surface Microstructure ◽  
Ion Milling ◽  
Near Surface ◽  
Depth Profiles ◽  
Analytical Electron ◽  
Ion Implanted

Analytical electron microscopy (AEM) of the near surface microstructure of ion implanted ceramics can provide much information about these materials. Backthinning of specimens results in relatively large thin areas for analysis of precipitates, voids, dislocations, depth profiles of implanted species and other features. One of the most critical stages in the backthinning process is the ion milling procedure. Material sputtered during ion milling can redeposit on the back surface thereby contaminating the specimen with impurities such as Fe, Cr, Ni, Mo, Si, etc. These impurities may originate from the specimen, specimen platform and clamping plates, vacuum system, and other components. The contamination may take the form of discrete particles or continuous films [Fig. 1] and compromises many of the compositional and microstructural analyses. A method is being developed to protect the implanted surface by coating it with NaCl prior to backthinning. Impurities which deposit on the continuous NaCl film during ion milling are removed by immersing the specimen in water and floating the contaminants from the specimen as the salt dissolves.

Emergence of size induced metallic state in the ferromagnetic insulating Pr0.8Sr0.2MnO3 manganite: Breaking of surface polarons

2015 ◽  
Vol 8 (2) ◽  
pp. 2084-2093 ◽  
Author(s):  
PROLOY TARAN DAS ◽  
Arun Kumar Nigam ◽  
Tapan Kumar Nath
Keyword(s):  
Transport Properties ◽  
Metallic State ◽  
Temperature Dependent ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
System A ◽  
Surface Disorder ◽  
Bulk System ◽  
Magnetic Transport ◽  
Grain Surface

Nano-dimensional effects on electronic-, magneto-transport properties of granular ferromagnetic insulating (FMI) Pr0.8Sr0.2MnO3 (PSMO) manganite (down to 40 nm) have been investigated in details. From the electronic and magnetic transport properties, a metallic state has been observed in grain size modulation by suppressing the ferromagnetic insulating state of PSMO bulk system. A distinct metal-insulator transition (MIT) temperature around 150 K has been observed in all nanometric samples. The observed insulator to metallic transition with size reduction can be explained with surface polaron breaking model, originates due to enhanced grain surface disorder. This proposed phenomenological polaronic model plays a significant role to understand the polaronic destabilization process on the grain surface regime of these phase separated nano-mangnatie systems. Temperature dependent resistivity and magnetoresistance data in presence of external magnetic fields are investigated in details with various compatible models.

scholarly journals Effect of curing bath conditions on the morphology and structure of poly(high internal phase emulsion) fibers

2020 ◽  
Vol 138 (11) ◽  
pp. 50019
Author(s):  
Xuehui Gong ◽  
Boran Zhao ◽  
Ica Manas‐Zloczower ◽  
Donald L. Feke
Keyword(s):  
High Internal Phase Emulsion ◽  
Internal Phase ◽  
Morphology And Structure

scholarly journals The effect of the ultrasound agitation and source of ceria particles on the morphology and structure of the Zn-Co-CeO2 composite coatings

2021 ◽  
Author(s):  
Marija Riđošić ◽  
Asier Salicio-Paz ◽  
Eva García-Lecina ◽  
Piotr Zabinski ◽  
Ljiljana S. Živković ◽  
...  
Keyword(s):  
Composite Coatings ◽  
Morphology And Structure

scholarly journals Nanoindentation Hardness and Practical Scratch Resistance in Mechanically Tunable Anti-Reflection Coatings

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 213
Author(s):  
James J. Price ◽  
Tingge Xu ◽  
Binwei Zhang ◽  
Lin Lin ◽  
Karl W. Koch ◽  
...  
Keyword(s):  
High Hardness ◽  
Scratch Resistance ◽  
Test Methods ◽  
Consumer Electronics ◽  
Minimal Impact ◽  
Depth Profiles ◽  
Nanoindentation Hardness ◽  
Coating Durability ◽  
Design Freedom ◽  
Ar Coating

This work presents fundamental understanding of the correlation between nanoindentation hardness and practical scratch resistance for mechanically tunable anti-reflective (AR) hardcoatings. These coatings exhibit a unique design freedom, allowing quasi-continuous variation in the thickness of a central hardcoat layer in the multilayer design, with minimal impact on anti-reflective optical performance. This allows detailed study of anti-reflection coating durability based on variations in hardness vs. depth profiles, without the durability results being confounded by variations in optics. Finite element modeling is shown to be a useful tool for the design and analysis of hardness vs. depth profiles in these multilayer films. Using samples fabricated by reactive sputtering, nanoindentation hardness depth profiles were correlated with practical scratch resistance using three different scratch and abrasion test methods, simulating real world scratch events. Scratch depths from these experiments are shown to correlate to scratches observed in the field from consumer electronics devices with chemically strengthened glass covers. For high practical scratch resistance, coating designs with hardness >15 GPa maintained over depths of 200–800 nm were found to be particularly excellent, which is a substantially greater depth of high hardness than can be achieved using previously common AR coating designs.

Interfacial antiferromagnetic coupling and high spin polarization in metallic phthalocyanines

2021 ◽  
Vol 103 (2) ◽  
Author(s):  
Junwei Tong ◽  
Feifei Luo ◽  
Liuxia Ruan ◽  
Guohuai Liu ◽  
Lianqun Zhou ◽  
...  
Keyword(s):  
Spin Polarization ◽  
High Spin ◽  
Antiferromagnetic Coupling ◽  
High Spin Polarization

Facile synthesis of Co3O4-NiNPs composite for electrochemical non-enzymatic sensing platform of small chemical molecules

2021 ◽  
Author(s):  
Miaomiao Zou ◽  
Li Feng ◽  
Xiaoyun Lin ◽  
Yongnian Ni
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Facile Synthesis ◽  
Nano Composite ◽  
Sensing Platform ◽  
Morphology And Structure ◽  
Small Chemical

In this paper, a new Co3O4-Ni nano-composite modified glassy carbon electrode (Co3O4-NiNPs/GCE) was successfully constructed and used to detect glucose and hydrogen peroxide (H2O2). The morphology and structure of Co3O4...

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