Investigation of electrical behavior of lanthanum doped yttrium chromite nanoparticles

2017 ◽  
Author(s):  
R. Sinha ◽  
S. Basu ◽  
A. K. Meikap
Keyword(s):  
Electrical Behavior ◽  
Yttrium Chromite

Faceted antiphase boundaries in GaAs grown on Ge

1987 ◽  
Vol 45 ◽  
pp. 314-315
Author(s):  
N.-H. Cho ◽  
S. McKernan ◽  
C.B. Carter ◽  
K. Wagner
Keyword(s):  
Cross Section ◽  
Atomic Resolution ◽  
Face Centered Cubic ◽  
Electrical Behavior ◽  
Sphalerite Structure ◽  
Antiphase Boundaries ◽  
Transmission Electron ◽  
Face Centered ◽  
Quality Material ◽  
Simulated Images

Interest has recently increased in the possibility of growing III-V compounds epitactically on non-polar substrates to produce device quality material. Antiphase boundaries (APBs) may then develop in the GaAs epilayer because it has sphalerite structure (face-centered cubic with a two-atom basis). This planar defect may then influence the electrical behavior of the GaAs epilayer. The orientation of APBs and their propagation into GaAs epilayers have been investigated experimentally using both flat-on and cross-section transmission electron microscope techniques. APBs parallel to (110) plane have been viewed at the atomic resolution and compared to simulated images.Antiphase boundaries were observed in GaAs epilayers grown on (001) Ge substrates. In the image shown in Fig.1, which was obtained from a flat-on sample, the (110) APB planes can be seen end-on; the faceted APB is visible because of the stacking fault-like fringes arising from a lattice translation at this interface.

Electrical Damage Due to Low Energy Plasma Processing of GaAs Structures

1991 ◽  
Vol 223 ◽  
Author(s):  
Hans P. Zappe ◽  
Gudrun Kaufel
Keyword(s):  
Chemical Processes ◽  
Low Energy ◽  
Electrical Behavior ◽  
Rapid Thermal Anneal ◽  
High Temperature Anneal ◽  
Significant Damage ◽  
Low Energies ◽  
Long Time ◽  
Physical Plasma

ABSTRACTThe effect of numerous plasma reative ion etch and physical milling processes on the electrical behavior of GaAs bulk substrates has been investigated by means of electric microwave absorption. It was seen that plasma treatments at quite low energies may significantly affect the electrical quality of the etched semiconductor. Predominantly physical plasma etchants (Ar) were seen to create significant damage at very low energies. Chemical processes (involving Cl or F), while somewhat less pernicious, also gave rise to electrical substrate damage, the effect greater for hydrogenic ambients. Whereas rapid thermal anneal treatments tend to worsen the electrical integrity, some substrates respond positively to long-time high temperature anneal steps.

scholarly journals Impedance Spectroscopy of Lead-Free Ferroelectric Coatings

Coatings ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 221
Author(s):  
Mariya Aleksandrova ◽  
Ivailo Pandiev
Keyword(s):  
Composite Coatings ◽  
Electrical Circuit ◽  
Ferroelectric Materials ◽  
Piezoelectric Transducers ◽  
Lead Free ◽  
Electrical Behavior ◽  
Oxide Composite ◽  
Before And After ◽  
Frequency Dependences ◽  
Good Agreement

This paper presents impedance measurements of ferroelectric structures involving lead-free oxide and polymer-oxide composite coatings for sensing and energy harvesting applications. Three different ferroelectric materials grown by conventional microfabrication technologies on solid or flexible substrates are investigated for their basic resonant characteristics. Equivalent electrical circuit models are applied to all cases to explain the electrical behavior of the structures, according to the materials type and thickness. The analytical results show good agreement with the experiments carried out on a basic types of excited thin-film piezoelectric transducers. Additionally, temperature and frequency dependences of the dielectric permittivity and losses are measured for the polymer-oxide composite device in relation with the surface morphology before and after introduction of the polymer to the functional film.

scholarly journals The origin of hysteresis in the electrical behavior of RuO2-glass composite melts

2021 ◽  
Vol 557 ◽  
pp. 120596
Author(s):  
Rafael B. Nuernberg ◽  
Norma Maria P. Machado ◽  
Dylan Jouglard ◽  
Leire del Campo ◽  
Mohammed Malki ◽  
...  
Keyword(s):  
Electrical Behavior ◽  
Glass Composite

scholarly journals Electrode Design for MnO2-Based Aqueous Electrochemical Capacitors: Influence of Porosity and Mass Loading

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2990
Author(s):  
Camille Douard ◽  
Laurence Athouël ◽  
David Brown ◽  
Olivier Crosnier ◽  
Guillaume Rebmann ◽  
...  
Keyword(s):  
Electrode Materials ◽  
Large Mass ◽  
Time Response ◽  
High Mass ◽  
Mass Loading ◽  
Electrical Behavior ◽  
Power Battery ◽  
Porosity Effect ◽  
Fabrication Parameters ◽  
Crucial Parameter

The purpose of this study is to highlight the influence of some fabrication parameters, such as mass loading and porosity, which are not really elucidated and standardized during the realization of electrodes for supercapacitors, especially when using metal oxides as electrode materials. Electrode calendering, as one stage during the fabrication of electrodes, was carried out step-by-step on manganese dioxide electrodes to study the decreasing porosity effect on the electrochemical performance of a MnO2 symmetric device. One other crucial parameter, the mass loading, which has to be understood and well used for realistic supercapacitors, was investigated concurrently. Gravimetric, areal and volumetric capacitances are highlighted, varying the porosity for low-, medium- and large-mass loading. Low-loading leads to the best specific capacitances but is not credible for realistic supercapacitors, except for microdevices. Down 50% porosities after calendering, capacitances are increased and become stable faster, suggesting a faster wettability of the dense electrodes by the electrolyte, especially for high-mass loading. EIS experiments performed on electrodes without and with calendering lead to a significant decrease of the device’s time response, especially at high loading. A high-mass loading device seems to work as a power battery, whereas electrode calendaring, which allows decreasing the time response, leads to an electrical behavior closer to that expected for a supercapacitor.

Performance of ferrite fillers on electrical behavior of polymer nanocomposite electrolyte

2011 ◽  
Vol 84 (4) ◽  
pp. 343-356 ◽  
Author(s):  
Kamlesh Pandey ◽  
Mrigank Mauli Dwivedi ◽  
Markandey Singh ◽  
S.L. Agrawal
Keyword(s):  
Polymer Nanocomposite ◽  
Electrical Behavior ◽  
Nanocomposite Electrolyte ◽  
Polymer Nanocomposite Electrolyte

Environmental effects on the electrical behavior of pentacene thin-film transistors with a poly(methyl methacrylate) gate insulator

2013 ◽  
Vol 14 (9) ◽  
pp. 2101-2107 ◽  
Author(s):  
Jaehoon Park ◽  
Lee-Mi Do ◽  
Jin-Hyuk Bae ◽  
Ye-Sul Jeong ◽  
Christopher Pearson ◽  
...  
Keyword(s):  
Thin Film ◽  
Methyl Methacrylate ◽  
Environmental Effects ◽  
Thin Film Transistors ◽  
Gate Insulator ◽  
Electrical Behavior ◽  
Poly Methyl Methacrylate
Sign in / Sign up

Export Citation Format

Share Document