Volume 76, Number 5, December 2006
|Page(s)||933 - 937|
|Section||Condensed matter: electronic structure, electrical, magnetic, and optical properties|
|Published online||01 November 2006|
Optical indication of metallic clusters in the layered manganites above
The Institute of Metal Physics of UD of the Russian Academy of Sciences 620041, Ekaterinburg, S. Kovalevskoy str. 18, Russia
Accepted: 3 October 2006
Optical absorption in the bi-layered manganites ( and 0.4) was studied and metallic clusters were revealed in the temperature range in the composition with . The existence of metal clusters is considered as the principal cause of magnetoresistance, the tails of magnetization and ferromagnetic correlations, which are observed in this manganite up to temperatures several times exceeding the temperature of 3D magnetic ordering.
PACS: 75.47.Lx – Manganites / 78.20.-e – Optical properties of bulk materials and thin films
© EDP Sciences, 2006
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