ISSN:
1434-6036
Keywords:
PACS. 75.30.Vn Colossal magnetoresistance – 71.30.+h Metal-insulator transitions and other electronic transitions – 76.30.-v Electron paramagnetic resonance and relaxation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract: The magnetic transport properties have been measured for La0.67-xYxCa0.33MnO3 ( 0 ⩽ x ⩽ 0.14) system. It was found that the transition temperature T p almost linearly moves to higher temperature as H increases. Electron spin resonance confirms that above T p , there exist ferromagnetic clusters. From the magnetic polaron point of view, the shift of T p vs. H was understood, and it was estimated that the size of the magnetic polaron is of 9.7 ∼ 15.4 Å which is consistent with the magnetic correlation length revealed by the small-angle neutron-scattering technique. The transport properties at temperatures higher than T p conform to the variable-range hopping mechanism.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1140/epjb/e2003-00068-8
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