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Type: Artigo de evento
Title: Magnetic Properties Of Bimetallic Aupdo And Aupd Nanoparticles Confined In Ordered Mesoporous Silica Sba-15 Channels
Author: Iwamoto W.
Lesseux G.G.
Dias B.F.
Teixeira-Neto A.A.
Teixeira-Neto E.
Urbano R.R.
Rettori C.
Abstract: In this work we report on the magnetic properties of the composites bimetallic AuPdO and AuPd nanoparticles (AuPdO- and AuPd-NPs) supported on mesoporous silica SBA-15 channels (AuPdO- and AuPd-NPs/SBA-15) by means of Electron Spin Resonance and Magnetization experiments. A single magnetic resonance line was observed from 300 K down to 50 K. The normalized integrated resonance intensity remains nearly constant in the entire range of temperature. Magnetization measurements at 300 K were able to detect magnetic loops due to the AuPdO and AuPd-NPs, in spite of the small amount of NPs (~ 1.5 % wt.) present in our samples and the relatively large intrinsic magnetization of the mesoporous silica SBA-15 supports. These results characterize the observed resonance as a ferromagnetic resonance (FMR).
Rights: fechado
Identifier DOI: 
Date Issue: 2013
Appears in Collections:Unicamp - Artigos e Outros Documentos

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