Ogale, S. B. ; Shreekala, R. ; Bathe, Ravi ; Date, S. K. ; Patil, S. I. ; Hannoyer, B. ; Petit, F. ; Marest, G. (1998) Transport properties, magnetic ordering, and hyperfine interactions in Fe-doped La0.75Ca0.25MnO3: localization-delocalization transition Physical Review B, 57 (13). pp. 7841-7845. ISSN 0163-1829
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Official URL: http://prb.aps.org/abstract/PRB/v57/i13/p7841_1
Related URL: http://dx.doi.org/10.1103/PhysRevB.57.7841
Abstract
Transport properties of La0.75Ca0.25Mn1-xFexO3+y ceramics are examined for "x" values from 0 to 0.05. Dramatic changes are observed in the resistivity and its temperature dependence as "x" increases above about 0.04. Temperature-dependent Mossbauer spectroscopy and magnetization studies are also performed. These data suggest that transport in this system necessarily involves quasiparticle excitation in association with the double exchange process and it undergoes localization-delocalization-type transition at a critical dopant concentration.
| Item Type: | Article |
|---|---|
| Source: | Copyright of this article belongs to American Physical Society. |
| ID Code: | 26889 |
| Deposited On: | 08 Dec 2010 13:02 |
| Last Modified: | 11 Jun 2011 11:29 |
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