English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/37788
Title: Fe Impurities Weaken the Ferromagnetic Behavior in Au Nanoparticles
Authors: Crespo, Patricia; García, M. A.; Fernández Pinel, E.; Multigner, M.; Alcántara, David; Penadés, Soledad; Hernando, Antonio
Keywords: Magnetic impurities
Au NPs
Issue Date: 26-Oct-2006
Publisher: American Physical Society
Citation: Physical Review Letters 97(17): 177203 (2006)
Abstract: In this Letter, we report on a crucial experiment showing that magnetic impurities reduce the ferromagnetic order temperature in thiol-capped Au glyconanoparticles (GNPs). The spontaneous magnetization of AuFe GNPs exhibits a fast decrease with temperature that contrasts with the almost constant value of the magnetization observed in Au NPs. Moreover, hysteresis disappears below 300 K. Both features indicate that Fe impurities reduce the high local anisotropy field responsible for the ferromagnetic behavior in Au GNPs. As a consequence, the amazing ferromagnetism in Au NPs should not be associated with the presence of magnetic impurities.
Description: 4 páginas, 4 figuras, 1 tabla.
Publisher version (URL): http://dx.doi.org/10.1103/PhysRevLett.97.177203
URI: http://hdl.handle.net/10261/37788
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.97.177203
E-ISSN: 1079-7114
Appears in Collections:(IIQ) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.