Chemical and Physical Properties of Soluble Part of Emeraldine: Comparison with Insoluble Emeraldine

1989 ◽  
Vol 173 ◽  
Author(s):  
R. Laversanne ◽  
P. Vaca
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Conduction Mechanism ◽  
Emeraldine Salt ◽  
Electrical And Magnetic Properties ◽  
Physical Study ◽  
Low Weight ◽  
The One ◽  
Soluble Part

ABSTRACTA preliminary physical study of the soluble part of emeraldine is presented. The electrical and magnetic properties of this low weight material are very similar of those of the pristine emeraldine salt. These results emphazise the possible role of short chain species in the conduction mechanism of polyaniline. In order to clarify this point, previous magnetic investigations on insoluble emeraldine salts are revisited. It appears that the fit of the magnetic susceptibility temperature dependence of polyaniline with a Curie law plus a Pauli term might not be justified at low temperature. A T−α law with a ≈ 0.75 gives a better fit suggesting a behavior similar to the one found in Random Exchange Heisenberg Antiferromagnetic Chain (REHAC)

Role of Fe Doping on Local Structure and Electrical and Magnetic Properties of PbTiO3

2021 ◽  
Author(s):  
Hasitha Ganegoda ◽  
Soham Mukherjee ◽  
Beihai Ma ◽  
Daniel T. Olive ◽  
James H. McNeely ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Local Structure ◽  
Fe Doping ◽  
Electrical And Magnetic Properties

Magnetite thin films grown on different flexible polymer substrates at room temperature: Role of antiphase boundaries in electrical and magnetic properties

2020 ◽  
Vol 846 ◽  
pp. 156368
Author(s):  
Mohammad Shahnawaze Ansari ◽  
Mohd Hafiz Dzarfan Othman ◽  
Mohammad Omaish Ansari ◽  
Sana Ansari ◽  
Huda Abdullah ◽  
...  
Keyword(s):  
Thin Films ◽  
Magnetic Properties ◽  
Room Temperature ◽  
Antiphase Boundaries ◽  
Polymer Substrates ◽  
Electrical And Magnetic Properties ◽  
Flexible Polymer

Application of Gel Technology in Preparation of High-Tc Perovskite Superconductors

1987 ◽  
Vol 99 ◽  
Author(s):  
R. S. Liu ◽  
G. C. Lin ◽  
H. M. Sung ◽  
Y. C. Chen ◽  
O. C. C. Lin
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Diffraction Analysis ◽  
Dicarboxylic Acids ◽  
X Ray Diffraction ◽  
Chemical Homogeneity ◽  
High Tc ◽  
X Ray ◽  
Electrical And Magnetic Properties ◽  
High Degree

ABSTRACTLa-Ba-Cu-O and Y-Ba-Cu-O superconducting systems have been successfully prepared by gel techniques with high degree of chemical homogeneity. The precursor gel was synthesized from mixture of the corresponding metallic nitrates and di-carboxylic acids. The sintered oxides prepared from the different dicarboxylic acids were all Tc = 90K perovskite superconductors. However differences in electrical and magnetic properties were also observed. Effects due to the different acids elucidated by magnetic susceptibility measurements and X-ray diffraction analysis will be discussed.

Synthesis, Structures and Magnetic Properties of a Family of One-Dimensional Oxides

1996 ◽  
Vol 453 ◽  
Author(s):  
H.-C. Zur Loye ◽  
P. Núñez ◽  
M. A. Rzeznik
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Rietveld Refinement ◽  
Diffraction Data ◽  
X Ray Diffraction ◽  
Magnetic Susceptibility Data ◽  
One Dimensional ◽  
X Ray ◽  
Susceptibility Data ◽  
The One

AbstractThe one-dimensional compounds Sr3MgPtO6, Sr3MgIrO6, Sr3MgRhO6, Sr3GdRhO6, have been synthesized and structurally characterized by Rietveld refinement of powder X-ray diffraction data. All four compounds are isostructural with the rhombohedral K4CdCl6-type structure. The structure consists of infinite one-dimensional chains of alternating face-shared MO6 octahedra (M = Pt, Ir, Rh) and M′O6 (M′ = Gd, Mg) trigonal prisms. The strontium cations are located in a distorted square antiprismatic environment. Magnetic susceptibility data show that both Sr3MgIrO6 and Sr3MgRhO6 obey the Curie-Weiss law with θ = −6(1) K, and θ= −15(3)K, respectively. Sr3GdRhO6 obeys the Curie law with μeff = 7.80 B.M, consistent with an oxidation state of +3 for both rhodium and gadolinium.

Superconductivity and Normal-State Properties of (Y1-x-yZrxCay)Ba2Cu3O7-δ Compounds

1998 ◽  
Vol 12 (28) ◽  
pp. 1175-1183 ◽  
Author(s):  
I. Gr. Deac ◽  
A. V. Pop ◽  
V. Pop ◽  
R. Tetean ◽  
D. Kovacs ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Powder Diffraction ◽  
Normal State ◽  
Lattice Parameters ◽  
Temperature Dependent ◽  
Dopant Content ◽  
X Ray ◽  
Electrical And Magnetic Properties ◽  
Normal State Properties

The electrical and magnetic properties of ( Y 1-x-y Zr x Ca y) Ba 2 Cu 3 O 7-δ ceramics are investigated by using resistivity, ac and dc susceptibility measurements. X-ray powder diffraction has been used to find the lattice parameters of the samples. The samples are orthorhombic, except the sample with x=0.15 and y=0.2 which is tetragonal. All the samples are superconducting. There is no significant change in Tc for the Zr-doped ( Y 1-x Zr x) Ba 2 Cu 3 O 7-δ samples, while for the ( Y 0.85-y Zr 0.15 Ca y) Ba 2 Cu 3 O 7-δ compounds the Tc decrease with the dopant content and they show temperature dependent dc magnetic susceptibility, in the normal state.

Role of charge doping and distortions on the structural, electrical, and magnetic properties of modified CuFeO2 compounds

2020 ◽  
Vol 127 (17) ◽  
pp. 175704
Author(s):  
Nishant Barot ◽  
Prashant K. Mehta ◽  
Ashok Rao ◽  
Riya Thomas ◽  
Yung-Kang Kuo ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Electrical And Magnetic Properties ◽  
Charge Doping

ON THE STRUCTURAL, THERMAL, ELECTRICAL, AND MAGNETIC PROPERTIES OF AuSn

1963 ◽  
Vol 41 (12) ◽  
pp. 2252-2266 ◽  
Author(s):  
J.-P. Jan ◽  
W. B. Pearson ◽  
A. Kjekshus ◽  
S. B. Woods
Keyword(s):  
Thermal Conductivity ◽  
Magnetic Properties ◽  
Electrical Resistivity ◽  
Magnetic Susceptibility ◽  
Air Temperature ◽  
Homogeneity Range ◽  
Room Temperature ◽  
Lattice Constants ◽  
Conduction Electrons ◽  
Electrical And Magnetic Properties

The Au1−xSn phase has a homogeneity range within the limits 50.0 and 50.5 at.% Sn. The lattice constants and observed densities vary between the limits:[Formula: see text]The thermal conductivity, electrical resistivity, and absolute thermoelectric power of oriented single crystals of Au1−xSn have been measured between 2.5° K and room temperature. The results exhibit pronounced anisotropies. Measurements of the magnetic susceptibility between liquid air temperature and 650–750° K are also reported for three different Au1−xSn alloys.The various results are discussed, and some speculations are presented regarding the number of conduction electrons in AuSn.

Role of Annealing Temperatures on Mechanical, Optical, Electrical and Magnetic Properties of Nanohydroxyapatite Biomaterial

2019 ◽  
Vol 19 (8) ◽  
pp. 4366-4376 ◽  
Author(s):  
R Panneerselvam ◽  
N Anandhan ◽  
G Sivakumar ◽  
K. P Ganesan ◽  
T Marimuthu ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Annealing Temperatures ◽  
Electrical And Magnetic Properties

Density-, temperature-, and concentration-induced metal–nonmetal transitions in fluids

1977 ◽  
Vol 55 (11) ◽  
pp. 2225-2239 ◽  
Author(s):  
F. Hensel
Keyword(s):  
Magnetic Properties ◽  
Structure Factor ◽  
Electrical And Magnetic Properties ◽  
Microscopic Inhomogeneity ◽  
Fluid Systems ◽  
Semiconducting Alloys ◽  
Nonmetal Transition ◽  
Continuous Metal ◽  
Experimental Survey

A brief review is given of the continuous metal–nonmetal transition observed in different fluid systems, with special emphasis on recent work by the author and his colleagues. Selected results of abroad experimental survey of the electrical and magnetic properties of fluid binary semiconducting alloys, expanded fluid metals, and fluid selenium are reported. The results are discussed with special emphasis on their relationship to some theoretical areas of controversy, especially the importance of the amount of covalency and ionicity for the electrical and magnetic properties of semiconducting alloys, the role of chemical bond satisfaction in covalent selenium and tellurium for the temperature-induced nonmetal to metal transition, and some speculations concerning the importance of fluctuations and microscopic inhomogeneity for the metal–nonmetal transition in expanded fluid metals. It is concluded that no theory of the metal–nonmetal transition is available which is generally valid for all the fluid systems discussed. It is proposed that measurements of the structure factor and of thermodynamic data of the fluids are necessary to make it possible to formulate a theory which is tested experimentally. The first new results of the structure factor and the compressibility of fluid expanded rubidium are reported.

Sign in / Sign up

Export Citation Format

Share Document