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García, M. A.. ; Ruiz González, M. L. ; Quesada, A. ; González Calbet, J. M. ; Hernando Grande, Antonio | American Physical Society | 2005-06-03In this Letter, we experimentally show that the room temperature ferromagnetism in the Mn-Zn-O system recently observed is associated with the coexistence of Mn^(3+) and Mn^(4+) via a double-exchange mechanism. The presence of the ZnO around MnO[...]texto impreso
Presa Muñoz del Toro, Patricia de la ; Multigner, M. ; Venta,, J. de la ; García, M. A. ; Ruiz González, M. L. | American Institute of Physics | 2006-12-15In this work the study of oleic acid and oleylamine-capped gold nanoparticles is presented. The structural characterization of the sample shows 6.7 nm gold nanoparticles with a narrow size distribution. The experimental optical absorption spectr[...]
