Hopping Conduction in a Magnetic Field

1984 ◽  
pp. 155-179 ◽  
Author(s):  
Boris I. Shklovskii ◽  
Alex L. Efros
Keyword(s):  
Magnetic Field ◽  
Hopping Conduction

Theory of hopping conduction in two-dimensional impurity band under strong magnetic field

1982 ◽  
Vol 43 (6) ◽  
pp. 475-477 ◽  
Author(s):  
N.A. Usov ◽  
F.R. Ulinich ◽  
Yu.B. Grebenschikov
Keyword(s):  
Magnetic Field ◽  
Strong Magnetic Field ◽  
Impurity Band ◽  
Hopping Conduction ◽  
Two Dimensional

scholarly journals Magnetic and Electric Studies of a New Cu(II) Perovskite-like Material

2004 ◽  
Vol 59 (1-2) ◽  
pp. 35-46 ◽  
Author(s):  
Mohga F. Mostafa ◽  
Ahmed A. A Youssef
Keyword(s):  
Magnetic Field ◽  
Thermal Analysis ◽  
Low Temperatures ◽  
Hopping Conduction ◽  
Thermally Activated ◽  
Universal Power Law ◽  
Initial Magnetic Susceptibility ◽  
Ferromagnetic Ordering ◽  
Type Conduction ◽  
Band Type

Thermal analysis of a lipid-like bilayer of [(CH2)9 (NH3)2]CuCl4 indicates one minor transition at 303 K and the following five major ones (with entropies in J/K-mole):The initial magnetic susceptibility at 320 Hz and a magnetic field of 160 A/m in the temperature range 75 - 290 K revealed a Curie-Weiss behavior of phase (V) and possible ferromagnetic ordering of phases (VI) and (IV) at low temperatures. The variation of the dielectric permittivity with temperature at 60.0 Hz - 100 kHz indicates large changes of the dipole moment at the transition temperatures. The conductivity is thermally activated and frequency dependent, following the universal power law: σ (ω) =σdc +A(T)ωs(T). Values of s being phase dependent. For phase (I), T > 383 K, band type conduction prevails. Hopping conduction is found in phases(II) and (III). Comparison with other Cuand Cd-containing materials is made. -PACS: 76, 77

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