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Role of pH and current density in electrodeposited soft
magnetic Co–Ni–Fe alloy thin films
K. SUNDARAM1, M. RAJA2, S. THANIKAIKARASAN3,
J.P. CHU4, T. MAHALINGAM1
1Department of Physics
Alagappa University
Karaikudi – 630 003
India
2Department of Physics
Kalasalingam University
Krishnankoil – 626 790
India
3Centre for Scientific and Applied Research
School of Basic Engineering and Science
PSN college of Engineering and Technology
Tirunelveli – 627 152
India
4Department of Polymer Engineering
National Taiwan University of Science and Technology
Taipei – 10907
Taiwan
FeS2 quantum dots sensitized nanostructured TiO2
solar cell: photoelectrochemical and photoinduced
absorption spectroscopy studies
I. BEDJA
CRC, Department of Optometry
College of Applied Medical Sciences
King Saud University
PO Box 10219 Riyadh
11433 Saudi Arabia
Influence of thermal treatment on the corrosion
resistance of electrolytic Zn–Ni coatings
K. WYKPIS, M. POPCZYK, J. NIEDBAŁA, A. BUDNIOK,
E. ŁĄGIEWKA, B. BIERSKA–PIECH
University of Silesia
Institute of Materials Science
Bankowa 12
40–007 Katowice
Poland
Novel microwave assisted synthesis of highly doped
phase pure Nd:YAG nanopowder
L. KIRANMALA, M. REKHA, M. NEELAM
Chemistry Division
Laser Science and Technology Centre
DRDO, Metcalfe House
Delhi–110054
India
TiO2 supported on SiO2 photocatalysts prepared using
ultrasonic–assisted sol–gel method
X.–L. YANG, C.–J. LIU, Y.–Q. LIU, X. LI, Y.–H. XU
Institute of Biomaterial
College of Science
South China Agricultural University
Guangzhou 510642
Guangdong
China
The influence of sublayer material on surface properties
of electrodeposited nickel with periodical structures
E. FATARAITĖ1, E. GRIŠKONIS1,2, A. GUOBIENĖ1, P. NARMONTAS1,
I. PROSYČEVAS1, S. TAMULEVIČIUS1
1Institute of Materials Science
of Kaunas University of Technology
Savanoriu 271
LT–50131 Kaunas
Lithuania
2Department of General Chemistry
Kaunas University of Technology
Radvilenu 19
LT–50254 Kaunas
Lithuania
Effect of heat-treatment on grain growth
of nanocrystalline tricalcium phosphate powder
synthesized via the precipitation method
I. MOBASHERPOUR1, E. SALAHI1, S.A. MANAFI2,
R. DARVISHI KAMACHALI1
1Ceramics Department
Materials and Energy Research Center
P.O. Box 31787–316
Tehran
Iran
2Ceramics Department
Shahrood branch
Islamic Azad University
Shahrood
Iran
AC susceptibility study of YBCO
N. GÜÇLÜ1, U. KÖLEMEN2
1Konya University
A.K. Education Faculty
Department of Physics
42090–Meram/Konya
Turkey
2Gaziosmanpaşa University
Faculty of Sciences and Art
Department of Physics
60240-Taşlçiftlik/Tokat
Turkey
Comparative cavitation erosion test on steels
produced by ESR and AOD refining
M. DOJČINOVIĆ
Faculty of Technology and Metallurgy
University of Belgrade
Karnegijeva 4
11000 Belgrade
Serbia
Determination of the electronic band structure
of the rutile polymorph of TiO2: a quantum
chemical approach
P. J. BARDZIŃSKI1,2
1Imperial College London
Thomas Young Centre
Computational Materials Science Group
South Kensington Campus
Exhibition Road
London SW7 2AZ
Great Britain
2Wroclaw University of Technology
Institute of Materials Science and Technical Mechanics
B1 building – room 110
Smoluchowskiego 25
50–370 Wrocław
Poland
Mechanisms of carriers transport
in Ni/n–SiC, Ti/n–SiC ohmic contacts
R. KISIEL1, M. GUZIEWICZ2, K. GOLASZEWSKA2,
M. SOCHACKI1, W. PASZKOWICZ3
1Warsaw University of Technology
Institute of Microelectronics and Optoelectronics
ul. Koszykowa 75
00–662 Warszawa
Poland
2Institute of Electron Technology
Al. Lotników 32/46
02–668 Warszawa
Poland
3Institute of Physics
Polish Academy of Science
Al. Lotników 32/46
02–668 Warszawa
Poland
Abstract
A mechanism of carriers transport through metal–semiconductor interface created by nickel or titanium-based ohmic contacts on Si–face n–type 4H–SiC is presented herein. The mechanism was observed within the temperature range of 20 °C ÷ 300 °C which are typical for devices operating at high current density and at poor cooling conditions. It was found that carriers transport depends strongly on concentration of dopants in the epitaxial layer. The carriers transport has thermionic emission nature for low dopant concentration of 5×1016 cm–3. The thermionic emission was identified for moderate dopant concentration of 5×1017 cm–3 at temperatures higher than 200 °C. Below 200 °C, the field emission dominates (for the same doping level of 5×1017 cm–3). High dopant concentration of 5×1018 cm–3 leads to almost pure field emission transport within the whole investigated temperature range.
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