High temperature electrical transport study of Si-doped AlN

2016 ◽  
Vol 98 ◽  
pp. 253-258 ◽  
Author(s):  
Sylvie Contreras ◽  
Leszek Konczewicz ◽  
Jaweb Ben Messaoud ◽  
Hervé Peyre ◽  
Mohamed Al Khalfioui ◽  
...  
Keyword(s):  
High Temperature ◽  
Electrical Transport ◽  
Transport Study ◽  
Si Doped

Martensitic features in Si doped CeFe2 revealed by magnetization and transport study

2010 ◽  
Vol 18 (9) ◽  
pp. 1772-1778 ◽  
Author(s):  
Arabinda Haldar ◽  
K.G. Suresh ◽  
A.K. Nigam
Keyword(s):  
Transport Study ◽  
Si Doped

Electrical and Dielectric Spectroscopic Characterization of Polycrystalline Dy2Si2O7

2012 ◽  
Vol 510-511 ◽  
pp. 194-200 ◽  
Author(s):  
Shahid Ameer ◽  
Asghari Maqsood
Keyword(s):  
High Temperature ◽  
Electrical Transport ◽  
Ac Conductivity ◽  
Orthorhombic Phase ◽  
Theoretical Models ◽  
Spectroscopic Characterization ◽  
Dielectric Parameters ◽  
Triclinic Phase ◽  
Electrical Conductivities ◽  
Phase Type

The compound Dy2Si2O7exists in two polymorphs, the low temperature triclinic phase (type B) and a high temperature orthorhombic phase (type E).The dc and ac electrical conductivities of E-Dy2Si2O7are measured in the temperature range 290-510 K and frequency range 1 kHz to 1 MHz . The dc electrical transport data are analyzed according to Motts variable-range hopping model. The disorder parameter (To) and density of states at fermi level are obtained. The ac conductivity σac(ω) is obtained through the dielectric parameters. The ac conductivity can be expressed as σac(ω) =B ωs, where s is slope and it decreases with increase in temperature. The conduction mechanism in the compound is discussed in low and high temperature regions in the light of theoretical models.

Superconductivity in SmFeAsO0.8F 0.2 Synthesized by High Pressure High Temperature Treatment

2011 ◽  
Vol 197-198 ◽  
pp. 499-502
Author(s):  
Zheng He Hua ◽  
Heng Zhang ◽  
Ju Peng
Keyword(s):  
High Pressure ◽  
High Temperature ◽  
Electrical Transport ◽  
Upper Critical Field ◽  
Magnetic Field Effect ◽  
Temperature Treatment ◽  
High Temperature Treatment ◽  
X Ray Diffraction ◽  
High Pressure High Temperature ◽  
High Transition

Superconducting SmFeAsO0.8F0.2 compound was successfully synthesized by high pressure high temperature treatment with pressure of 6 G Pa at 1400 °C for 2 hours. The X-ray diffraction pattern of the sample indicates the formation of the tetragonal ZrCuSiAs-type SmFeAsO0.8F0.2 with lattice parameters a=3.932 Å and c=8.490 Å. The electrical transport study shows that the sample has a rather high transition temperature Tc of about 52 K, and magnetic field effect on the resistance reveals a rather high upper critical field HC2 of about 65 T.

Microstructure and high-temperature tribological properties of Si-doped hydrogenated diamond-like carbon films

2018 ◽  
Vol 435 ◽  
pp. 963-973 ◽  
Author(s):  
Teng Fei Zhang ◽  
Zhi Xin Wan ◽  
Ji Cheng Ding ◽  
Shihong Zhang ◽  
Qi Min Wang ◽  
...  
Keyword(s):  
High Temperature ◽  
Tribological Properties ◽  
Carbon Films ◽  
Diamond Like Carbon ◽  
Si Doped
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