Mattei, G and Fernandez, C D and Mazzoldi, P and Sada, C and De, Goutam and Battaglin, G and Sangregorio, C and Gatteschi, D (2002) Synthesis, structure, and magnetic properties of Co, Ni, and Co-Ni alloy nanocluster-doped SiO2 films by sol-gel processing. Chemistry of Materials, 14 (8). pp. 3440-3447. ISSN 0897-4756

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The optical, structural, and magnetic properties of Co, Ni, and CoxNi100-x, (0 < x < 100) alloy nanoclusters in silica host obtained by the sol-gel route are presented. Throughout the entire range of composition investigated, from pure Ni to pure Co, the nanoclusters exhibit an fee structure, with lattice parameters increasing with the Co fraction in the system. This indicates Co-Ni alloy formation. It has also been observed that the average cluster diameter increases with increasing Co fraction in the system. An enhancement of the magnetic moment was exhibited in the pure Co and Ni samples, and good agreement between the measured values and those of the corresponding bulk alloys was found for the other samples. All composites are superparamagnetic at room temperature.

Item Type: Article
Subjects: Engineering Materials
Divisions: Sol Gel
Depositing User: Bidhan Chaudhuri
Date Deposited: 23 Mar 2012 06:52
Last Modified: 23 Mar 2012 06:52

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