Metal-insulator transitions and magnetic ordered states in oxygen-depleted manganites
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
01/05/2006
|
| Resumo |
The use of AC/DC magnetic susceptibility and impedance measurements to detect oxygen depletion effects in La0.7Ca0.3MnO3 +/-delta and NiMn2O4+delta spinel-type compounds is reported. For the NiMn2O4, for which no Mn4+ was found, three superposed Debye relaxations were observed in the range 260-180 K. Otherwise, in La0.7Ca0.3MnO3, the argon annealed has contributed to a decrease in T-C, but the amount of Mn4+ is still too high to allow the observation of a relaxation in this frequency window. (c) 2006 Elsevier B.V. All rights reserved. |
| Formato |
522-524 |
| Identificador |
http://dx.doi.org/10.1016/j.physb.2006.01.237 Physica B-condensed Matter. Amsterdam: Elsevier B.V., v. 378-80, p. 522-524, 2006. 0921-4526 http://hdl.handle.net/11449/31739 10.1016/j.physb.2006.01.237 WOS:000238426600222 |
| Idioma(s) |
eng |
| Publicador |
Elsevier B.V. |
| Relação |
Physica B: Condensed Matter |
| Direitos |
closedAccess |
| Palavras-Chave | #magnetic materials #spinels #impedance |
| Tipo |
info:eu-repo/semantics/article |
