Surface effects of metallic iron particles in zeolite NaX

V. Schünemann; H. Winkler; Ch Butzlaff; A. X. Trautwein

doi:10.1007/BF02072888

Surface effects of metallic iron particles in zeolite NaX

V. Schünemann^*, H. Winkler, Ch Butzlaff, A. X. Trautwein

^*Corresponding author for this work

Institute of Physics

6 Citations (Scopus)

Abstract

In situ Mössbauer, magnetization, ferromagnetic resonance and small-angle X-ray scattering measurements are used to characterize iron particles in the zeolite NaX, prepared by thermal decomposition of Fe(CO)₅. The examined system shows a bimodal size distribution of superparamagnetic α-Fe particles with mean diameters of 1.2+-0.1 nm located inside the supercages and 3.0 ±1.0 nm located in defect sites of the zeolite. An enhancement of the saturation magnetization of the smaller particles by about 30% with respect to the bulk value has been observed. This enhancement is most likely due to surface effects of ultra-small particles in which 90% of the atoms are surface atoms.

Original language	English
Journal	Hyperfine Interactions
Volume	93
Issue number	1
Pages (from-to)	1427-1432
Number of pages	6
ISSN	0304-3834
DOIs	https://doi.org/10.1007/BF02072888
Publication status	Published - 01.12.1994

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title = "Surface effects of metallic iron particles in zeolite NaX",

abstract = "In situ M{\"o}ssbauer, magnetization, ferromagnetic resonance and small-angle X-ray scattering measurements are used to characterize iron particles in the zeolite NaX, prepared by thermal decomposition of Fe(CO)5. The examined system shows a bimodal size distribution of superparamagnetic α-Fe particles with mean diameters of 1.2+-0.1 nm located inside the supercages and 3.0 ±1.0 nm located in defect sites of the zeolite. An enhancement of the saturation magnetization of the smaller particles by about 30% with respect to the bulk value has been observed. This enhancement is most likely due to surface effects of ultra-small particles in which 90% of the atoms are surface atoms.",

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AU - Schünemann, V.

AU - Winkler, H.

AU - Butzlaff, Ch

AU - Trautwein, A. X.

PY - 1994/12/1

Y1 - 1994/12/1

N2 - In situ Mössbauer, magnetization, ferromagnetic resonance and small-angle X-ray scattering measurements are used to characterize iron particles in the zeolite NaX, prepared by thermal decomposition of Fe(CO)5. The examined system shows a bimodal size distribution of superparamagnetic α-Fe particles with mean diameters of 1.2+-0.1 nm located inside the supercages and 3.0 ±1.0 nm located in defect sites of the zeolite. An enhancement of the saturation magnetization of the smaller particles by about 30% with respect to the bulk value has been observed. This enhancement is most likely due to surface effects of ultra-small particles in which 90% of the atoms are surface atoms.

AB - In situ Mössbauer, magnetization, ferromagnetic resonance and small-angle X-ray scattering measurements are used to characterize iron particles in the zeolite NaX, prepared by thermal decomposition of Fe(CO)5. The examined system shows a bimodal size distribution of superparamagnetic α-Fe particles with mean diameters of 1.2+-0.1 nm located inside the supercages and 3.0 ±1.0 nm located in defect sites of the zeolite. An enhancement of the saturation magnetization of the smaller particles by about 30% with respect to the bulk value has been observed. This enhancement is most likely due to surface effects of ultra-small particles in which 90% of the atoms are surface atoms.

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JO - Hyperfine Interactions

JF - Hyperfine Interactions

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Surface effects of metallic iron particles in zeolite NaX

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