Electrical resistivity measurements on fragile organic single crystals in the diamond anvil cell

2001 ◽  
Vol 72 (5) ◽  
pp. 2358-2360 ◽  
Author(s):  
T. Adachi ◽  
H. Tanaka ◽  
H. Kobayashi ◽  
T. Miyazaki
2004 ◽  
Vol 75 (11) ◽  
pp. 5010-5015 ◽  
Author(s):  
Shawn A. Boye ◽  
Daniel Rosén ◽  
Peter Lazor ◽  
Ilia Katardjiev

2003 ◽  
Vol 81 (1-2) ◽  
pp. 395-400 ◽  
Author(s):  
D Iliescu ◽  
I Baker ◽  
X Li

Both constant load creep and recrystallization are investigated using single crystals of 70–170 ppb sulfuric-acid-doped and -undoped ice. Both sets of crystals exhibited strains in excess of 200% under tensile creep. The undoped specimens reached these strains roughly twice as fast as the doped specimens. After large local strains were imparted to cuboidal single crystals using equal channel angular extrusion at –2°C and subsequent annealing at the same temperature, recrystallization occurred. It was found that a higher concentration of H2SO4 retarded both recrystallization and the subsequent grain-boundary migration. Direct current electrical resistivity measurements performed on polycrystalline, sulfuric-acid-doped (3 ppm) ice at –10°C showed a much lower resistivity in the grain boundaries than in the lattice. PACS No.: 81.90


2005 ◽  
Vol 19 (01n03) ◽  
pp. 263-266 ◽  
Author(s):  
K. TOKIWA ◽  
H. OKUMOTO ◽  
S. KONO ◽  
S. IGA ◽  
K. TAKEMURA ◽  
...  

Single crystals of multi-layered Ba 2 Ca 4 Cu 5 O 10( O , F )2 superconductor(F-0245) have been grown under a high pressure of 4.5 GPa . Single crystals with in-plane length of 500μm were typically obtained and flat shiny areas with more than 1 mm 2 were also observed on the surface of fractured samples. Tc values for these samples were determined by electrical resistivity measurements. These values were found to change from 70 K to 85 K by change of oxygen and fluorine contents in the starting mixture. The temperature dependence of resistivity showed characteristic of under-doped cuprate superconductors.


2016 ◽  
Vol 30 (10) ◽  
pp. 1650056 ◽  
Author(s):  
M. Abila Marselin ◽  
N. Victor Jaya

In this paper, pure NiO and Cu-doped NiO nanoparticles are prepared by co-precipitation method. The electrical resistivity measurements by applying high pressure on pure NiO and Cu-doped NiO nanoparticles were reported. The Bridgman anvil set up is used to measure high pressures up to 8 GPa. These measurements show that there is no phase transformation in the samples till the high pressure is reached. The samples show a rapid decrease in electrical resistivity up to 5 GPa and it remains constant beyond 5 GPa. The electrical resistivity and the transport activation energy of the samples under high pressure up to 8 GPa have been studied in the temperature range of 273–433 K using diamond anvil cell. The temperature versus electrical resistivity studies reveal that the samples behave like a semiconductor. The activation energies of the charge carriers depend on the size of the samples.


2005 ◽  
Vol 14 (6) ◽  
pp. 1223-1226 ◽  
Author(s):  
Luo Ji-Feng ◽  
Han Yong-Hao ◽  
Tang Ben-Chen ◽  
Gao Chun-Xiao ◽  
Li Min ◽  
...  

Electrical resistivity measurements on single crystals of gallium grown to conform approximately to the three axial directions have been extended to low temperatures, detailed investigation being made over the range 20.4 to 4.2° K. The anisotropy of this property increases in this region where the resistivity ratios for the three specimens are approximately 1: 2.1: 8 compared with 1: 2.1 6 : 6.5 5 at room temperature. The ‘ideal’ resistivity is proportional to T n , where n ≃ 4.45 for the range 5 to 12° K and decreases to about 3.9 for the range 12 to 20.4° K. The characteristic temperatures as derived from Grüneisen’s expression show relatively small differences for the three axial directions but decrease with decrease in temperature. Comparable variations with temperature are observed in the characteristic temperatures derived previously from specific heat measurements on gallium.


2011 ◽  
Vol 8 (5) ◽  
pp. 1692-1694 ◽  
Author(s):  
Baojia Wu ◽  
Yonghao Han ◽  
Gang Peng ◽  
Xiaowei Huang ◽  
Cailong Liu ◽  
...  

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