INVESTIGADORES
PIERELLA Liliana Beatriz
artículos
Título:
Magnetic behavior of Co clusters embedded in a zeolite matrix
Autor/es:
CLARA SAUX, LILIANA B. PIERELLA, PAULA BERCOFF Y HÉCTOR BERTORELLO
Revista:
PHYSICA B - CONDENSED MATTER
Editorial:
ELSEVIER SCIENCE BV
Referencias:
Lugar: Amsterdam; Año: 2004 p. 137 - 140
ISSN:
0921-4526
Resumen:
A medium pore zeolitic material with MFI structure modified with Co cations was synthesized. The magnetization Mand magnetic susceptibility w were measured as a function of T after ZFC and as a function of the applied magnetic fieldfor T between 4:2 and 30 K. No blocking temperature was detected and a pure superparamagnetic behavior wasobtained. M vs. T and w vs. T were adjusted by Brillouin and Langevin functions obtaining the same results in bothcases. Curve fitting gave an effective moment of 90mB for the cases under study. The results are analyzed in terms ofthe possible cluster structure that may appear.
