Mossbauer investigation of gamma-Fe2O3 nanocrystals in silica matrix prepared by the sol-gel method

CANNAS, CARLA;CONCAS, GIORGIO;CONGIU, FRANCESCO;MUSINU, ANNA MARIA GIOVANNA;
2002-01-01

Abstract

A series of Fe2O3-SiO2 nnocomposites (25 weight % of Fe2O3) has been prepared using a sol-gel method, Samples showing different features were obtained by varying the evaporation conditions acting on the surface / volume ratio of the starting sol. The samples were investigated using Mossbauer spectroscopy at low temperature. The Fe2O3 nanoparticles have been identified as maghemite (gamma-Fe2O3) particles. The samples show a superparamagnetic behavior with a blocking temperature that depends on the average particle size.
2002
57
3-4
154
158
5
WOS:000175591900007
Sì, ma tipo non specificato
Cannas, Carla; Concas, Giorgio; Congiu, Francesco; Musinu, ANNA MARIA GIOVANNA; Piccaluga, G; Spano, G.
1.1 Articolo in rivista
info:eu-repo/semantics/article
1 Contributo su Rivista::1.1 Articolo in rivista
262
6
none
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