Thermally activated drift mobility and small polaron conduction in La0.75Sr0.11Ca0.14MnO3 thin films investigated by the traveling wave method

Authors
Wang, L Yin, J Huang, SY Hunag, XF Xu, J Liu, ZG Chen, KJ
Citation
L. Wang et al., Thermally activated drift mobility and small polaron conduction in La0.75Sr0.11Ca0.14MnO3 thin films investigated by the traveling wave method, PHYS REV B, 60(10), 1999, pp. R6976-R6979
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
60
Issue
10
Year of publication
1999
Pages
R6976 - R6979
Database
ISI
SICI code
0163-1829(19990901)60:10<R6976:TADMAS>2.0.ZU;2-G
Abstract
We have clearly observed the thermal activation of the drift mobility in La 0.75Sr0.11Ca0.14MnO3 thin films above the Curie temperature. The drift mobi lity rises from 2.2 x 10(-2) cm(2)/Vs at 300 K to about 9.2 x 10(-2) cm(2)/ Vs at 410 K with activation energy of 171 meV. The measurements of the drif t mobility were made using the traveling wave method. Our results are in ag reement with small polaron theory, which indicates that the conduction in t he paramagnetic-insulator state of manganite films is dominated by thermall y assisted hopping of small polarons. [S0163-1829(99)50934-X].