Please use this identifier to cite or link to this item:
http://acervodigital.unesp.br/handle/11449/31739- Title:
- Metal-insulator transitions and magnetic ordered states in oxygen-depleted manganites
- Universidade Estadual Paulista (UNESP)
- Univ Rennes 1
- CSIC
- 0921-4526
- 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.
- 1-May-2006
- Physica B-condensed Matter. Amsterdam: Elsevier B.V., v. 378-80, p. 522-524, 2006.
- 522-524
- Elsevier B.V.
- magnetic materials
- spinels
- impedance
- http://dx.doi.org/10.1016/j.physb.2006.01.237
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/31739
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.