Anisotropic Magnetoresistance and Weak Localization in Granular System Ni-MgO

2015 ◽  
Vol 233-234 ◽  
pp. 501-504 ◽  
Author(s):  
Anton Grebennikov ◽  
Oleg Stognei
Keyword(s):  
Percolation Threshold ◽  
Metal Concentration ◽  
Weak Localization ◽  
Negative Magnetoresistance ◽  
Anisotropic Magnetoresistance ◽  
Granular System ◽  
High Metal Concentration ◽  
High Metal ◽  
Magnetoresistive Effect ◽  
Granular Composites

Magnetoresistive effect and electrotransport properties of Niх(MgO)100-х (x: 21-48 at.%) granular composites have been investigated. It is found that prepercolated composites (x < 24 at.%) do not exhibit magnetoresistive properties. After percolation threshold (x: 27-29 at.%) the composites exhibit isotropic negative magnetoresistance (-0,2 %) which has not tunneling nature. Also weak localization is realized in these samples at temperatures below 100 K. At high metal concentration (32 at.% < x) the composites exhibit anisotropic magnetoresistance.

scholarly journals Modeling the formation of high metal concentration zones in man-made deposits

2018 ◽  
Vol 12 (2) ◽  
pp. 76-84 ◽  
Author(s):  
Z Malanchuk ◽  
◽  
V Korniienko ◽  
Ye Malanchuk ◽  
V Soroka ◽  
...  
Keyword(s):  
Metal Concentration ◽  
High Metal Concentration ◽  
High Metal

Properties of nitric acid palladium solutions with a high metal concentration

2007 ◽  
Vol 80 (5) ◽  
pp. 695-704 ◽  
Author(s):  
A. B. Venediktov ◽  
S. V. Korenev ◽  
S. P. Khranenko ◽  
S. V. Tkachev ◽  
P. E. Plyusnin ◽  
...  
Keyword(s):  
Nitric Acid ◽  
Metal Concentration ◽  
High Metal Concentration ◽  
High Metal

scholarly journals Heavy Metal Concentration in Neotropical Aquatic Snakes (Helicops Pastazae) and Its Potential as a Bioindicator of Water Pollution

2021 ◽  
Author(s):  
María Jose Hurtado-Morales ◽  
Manuel Rodríguez ◽  
Adolfo Amezquita
Keyword(s):  
Water Pollution ◽  
Heavy Metal ◽  
Metal Concentration ◽  
Heavy Metal Concentration ◽  
Atomic Absorption Spectrophotometry ◽  
Trophic Chain ◽  
Sampling Point ◽  
High Metal ◽  
Metal Excretion

Abstract The purpose of the present study was to test the potential role of the aquatic snake Helicops pastazae as indicators of water pollution caused by heavy metals. In particular, we tested whether the total heavy metal concentration is related to (1) the position (upstream vs downstream) of the sampling point and its distance from the point where wastewater is discharged; (2) the taxonomic group studied and its place in the trophic chain: piscivorous snakes vs characid fish that co-occur with them; and (3) the organ or tissue examined: snake liver versus muscle. We quantified cadmium (Cd), chromium (Cr) and lead (Pb) by using atomic absorption spectrophotometry with electrothermal atomization. Significant differences were found between some of the sampling points, particularly high metal concentrations were detected upstream at point 1, but no clear spatial pattern was found. There were no significant differences in the concentration of any of the metals between fish and snake muscle, suggesting potential mechanisms of metal excretion in snakes. With regard to interactions, the snake liver had the highest concentrations of cadmium and the muscle of lead and chromium, which may indicate tissue affinity differences for certain metals. Altogether, our results indicate that H. pastazae accumulates contaminants differentially, depending on the tissue and location, which render them useful bioindicators of water contamination.

Negative magnetoresistance in ultrananocrystalline diamond: Strong or weak localization?

2008 ◽  
Vol 92 (1) ◽  
pp. 012120 ◽  
Author(s):  
T. C. Choy ◽  
A. M. Stoneham ◽  
M. Ortuño ◽  
A. M. Somoza
Keyword(s):  
Weak Localization ◽  
Negative Magnetoresistance ◽  
Ultrananocrystalline Diamond

scholarly journals Erratum to: Conductive percolation threshold of conductive-insulating granular composites

2006 ◽  
Vol 41 (13) ◽  
pp. 4373-4373
Author(s):  
L. Ren ◽  
J. Tong ◽  
D. Chen ◽  
D. He ◽  
Z. Han ◽  
...  
Keyword(s):  
Percolation Threshold ◽  
Granular Composites
Sign in / Sign up

Export Citation Format

Share Document