Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9838006 | Physica B: Condensed Matter | 2005 | 5 Pages |
Abstract
X-ray diffraction (XRD) and electron paramagnetic resonance (EPR) have been carried out in a La-deficient sample of La0.54Ca0.32MnO3. From the XRD pattern it was found that the crystal structure has been distorted by the deficiency in A (=La, Ca) position. The temperature dependence of EPR line intensity was successfully fitted by the exponential law based on the small polaron hopping model. High values of an activation energy (Ea=0.22eV) derived from EPR data are believed to relate to the above distortion, but EPR line-width, ÎHpp, and a slope, b, of the ÎHpp temperature dependence are not.
Related Topics
Physical Sciences and Engineering
Physics and Astronomy
Condensed Matter Physics
Authors
A.N. Ulyanov, T.N. Huynh, P.H. Quang, N.H. Sinh, S.C. Yu,