Effect Of Surface Oxidation On Magnetic And Electrical Properties of nc-Ni Particles

2008 ◽  
Author(s):  
Soumen Kar ◽  
N. K. Kishore ◽  
V. Srinivas ◽  
Amitabha Ghoshray ◽  
Bilwadal Bandyopadhyay
Keyword(s):  
Electrical Properties ◽  
Surface Oxidation ◽  
Effect Of Surface ◽  
Magnetic And Electrical Properties

scholarly journals Influence of Magnetite Nanoparticles Shape and Spontaneous Surface Oxidation on the Electron Transport Mechanism

Materials ◽  
2021 ◽  
Vol 14 (18) ◽  
pp. 5241
Author(s):  
Adrian Radoń ◽  
Mariola Kądziołka-Gaweł ◽  
Dariusz Łukowiec ◽  
Piotr Gębara ◽  
Katarzyna Cesarz-Andraczke ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Electrical Properties ◽  
Magnetite Nanoparticles ◽  
Average Particle Size ◽  
Electric Energy ◽  
Low Frequency ◽  
Surface Oxidation ◽  
Average Particle ◽  
Organic Modifiers ◽  
Magnetic And Electrical Properties

The spontaneous oxidation of a magnetite surface and shape design are major aspects of synthesizing various nanostructures with unique magnetic and electrical properties, catalytic activity, and biocompatibility. In this article, the roles of different organic modifiers on the shape and formation of an oxidized layer composed of maghemite were discussed and described in the context of magnetic and electrical properties. It was confirmed that Fe3O4 nanoparticles synthesized in the presence of triphenylphosphine could be characterized by cuboidal shape, a relatively low average particle size (9.6 ± 2.0 nm), and high saturation magnetization equal to 55.2 emu/g. Furthermore, it has been confirmed that low-frequency conductivity and dielectric properties are related to surface disordering and oxidation. The electric energy storage possibility increased for nanoparticles with a disordered and oxidized surface, whereas the dielectric losses in these particles were strongly related to their size. The cuboidal magnetite nanoparticles synthesized in the presence of triphenylphosphine had an ultrahigh electrical conductivity (1.02 × 10−4 S/cm at 10 Hz) in comparison to the spherical ones. At higher temperatures, the maghemite content altered the behavior of electrons. The electrical conductivity can be described by correlated barrier hopping or overlapping large polaron tunneling. Interestingly, the activation energies of electrons transport by the surface were similar for all the analyzed nanoparticles in low- and high-temperature ranges.

Magnetic and electrical properties of single-crystal La2−xSrxCu1−yNiyO4

2003 ◽  
Vol 388-389 ◽  
pp. 241-242 ◽  
Author(s):  
Nobuaki Watanabe ◽  
Takahiko Masui ◽  
Yutaka Itoh ◽  
Takato Machi ◽  
Isao Kato ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Single Crystal ◽  
Magnetic And Electrical Properties

Investigation of Magnetic and Electrical Properties of Multiferroic CZFO-PZT Nanocomposites

2011 ◽  
Author(s):  
P. R. Mandal ◽  
T. K. Nath ◽  
P. K. Bajpai ◽  
K. S. Ojha ◽  
K. N. Singh
Keyword(s):  
Electrical Properties ◽  
Magnetic And Electrical Properties

scholarly journals Compensation-dependence of magnetic and electrical properties in Ga1−xMnxP

2011 ◽  
Vol 98 (1) ◽  
pp. 012103 ◽  
Author(s):  
T. E. Winkler ◽  
P. R. Stone ◽  
Tian Li ◽  
K. M. Yu ◽  
A. Bonanni ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Magnetic And Electrical Properties
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