Polaron hopping conduction and thermoelectric power in LaMnO3+δ

2001 ◽  
Vol 89 (9) ◽  
pp. 4955-4961 ◽  
Author(s):  
Sudipta Pal ◽  
Aritra Banerjee ◽  
E. Rozenberg ◽  
B. K. Chaudhuri
Keyword(s):  
Thermoelectric Power ◽  
Hopping Conduction ◽  
Polaron Hopping

scholarly journals Small Polaron Hopping Conduction in Samples of Ceramic La1 · 4Sr1 · 6Mn2O7 · 06

1999 ◽  
Vol 52 (2) ◽  
pp. 187 ◽  
Author(s):  
H. Nakatsugawa ◽  
E. Iguchi ◽  
W. H. Jung ◽  
F. Munakata
Keyword(s):  
Thermoelectric Power ◽  
Ceramic Sample ◽  
Small Polaron ◽  
Hopping Conduction ◽  
Two Dimensional ◽  
Polaron Hopping ◽  
Small Polaron Hopping ◽  
Spin Ordering ◽  
The One ◽  
Increasing Temperature

The ceramic sample of La1 · 4Sr1 · 6Mn2O7 · 06 exhibits the metal-insulator transition and a negative magnetoresistance in the vicinity of the Curie temperature (T ⋍ 100 K). The dc magnetic susceptibility between 100 K and 280 K is nearly constant and decreases gradually with increasing temperature above 280 K. The measurements of dc resistivity and the thermoelectric power indicate that small polaron hopping conduction takes place at T > 280 K. The spin ordering due to the two-dimensional d x 2 ¡ y 2 state occurring at T > 280 K is directly related to the hopping conduction above 280 K, although the spin ordering due to the one-dimensional d 3z 2 ¡ r 2 state takes place at T > TC. The two-dimensional d x 2 ¡ y 2 state extending within the MnO2 sheets starts to narrow and leads to the carrier localisation at 280 K. The effective number of holes in this sample estimated from the thermoelectric power is considerably smaller than the nominal value. This indicates that the small polaron hopping conduction takes place predominantly within the in-plane MnO2 sheets. A discussion is given of the experimental results of the ceramic sample of La2/3Ca1/3MnO2·98.

Small polaron hopping conduction mechanism in Fe doped LaMnO3

2011 ◽  
Vol 135 (5) ◽  
pp. 054501 ◽  
Author(s):  
Wasi Khan ◽  
Alim H. Naqvi ◽  
Maneesha Gupta ◽  
Shahid Husain ◽  
Ravi Kumar
Keyword(s):  
Conduction Mechanism ◽  
Small Polaron ◽  
Hopping Conduction ◽  
Polaron Hopping ◽  
Small Polaron Hopping

Effect of epitaxial strain on small-polaron hopping conduction in Pr0.7(Ca0.6Sr0.4)0.3MnO3 thin films

2015 ◽  
Vol 106 (10) ◽  
pp. 102406 ◽  
Author(s):  
Jing Wang ◽  
Feng-xia Hu ◽  
Ying-ying Zhao ◽  
Yao Liu ◽  
Rong-rong Wu ◽  
...  
Keyword(s):  
Thin Films ◽  
Small Polaron ◽  
Hopping Conduction ◽  
Polaron Hopping ◽  
Small Polaron Hopping ◽  
Epitaxial Strain
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