Investigation of Superparamagnetism of Ferromagnetic Particles by Mossbauer Spectroscopy

Journal of Experimental and Theoretical Physics (1970)

A. M. Afanas’ev И. П. Суздалев Masaki Gen V.I. Goldanskii В. П. Корнеев É. A. Manykin

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Keywords:

Superparamagnetism

Solid-state physics

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Magnetic properties of thin films

Geomagnetism and Paleomagnetism Studies

Magnetic Properties and Synthesis of Ferrites

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A Magnetite Colloid System Studied by Mössbauer Spectroscopy

AIP conference proceedings (2005)

Э. Кузманн Z. Homonnay Zoltán Németh A. Vèrtes V. K. Garg

Magnetite loaded polyvinyl alcohol and polystyrol hydrogels were investigated by the help of 57Fe Mössbauer spectroscopy, XRD and transmission electron microscopy. Chemically cross‐linked polyvinyl alcohol hydrogels filled with magnetite particles were prepared from magnetite sol obtained from FeCl2 and FeCl3 in aqueous solution. At near room temperature, the Mössbauer spectrum has hyperfine fields smaller than those characteristic of bulk magnetite. The temperature dependent collapse of the hyperfine splitting can be associated with paramagnetism rather than superparamagnetism. This indicates that a special magnetic interaction occurs between the small particles. This may be interpreted in the terms of dynamic magnetic phenomenon in fine particle magnetite incorporated into swollen elastic polymer network by supposing magnetic ordering of clusters (after Boquet et al.) created by high concentration of defects when the hyperfine field distribution is mainly influenced by the slow relaxation of the magnetic moments of the clusters. Nevertheless, the effect of monodispersity of the colloid system may also contribute to the unusual relaxation shape of the Mössbauer spectra.

Superparamagnetism

Polyvinyl Alcohol

10.1063/1.1923659

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Mossbauer Spectroscopy in Ferromagnetic Metal

Surfaces Teruya Shinjo

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Superparamagnetism and Mössbauer Spectroscopy: a Review and New Results on Iron Dispersion

Springer eBooks (1967)

David W. Collins James T. Dehn L. N. Mulay

Superparamagnetism

Diamagnetism

10.1007/978-1-4757-1547-7_6

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Citations (20)

SUPERPARAMAGNETISM AND MOESSBAUER SPECTROSCOPY: A REVIEW AND NEW RESULTS ON IRON DISPERSION.

David W. Collins James T. Dehn L. N. Mulay

Superparamagnetism

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A Ferrimagnetic Resonance and Mössbauer Spectroscopic Study on the Superparamagnetism of Supported Iron Oxides

Springer eBooks (1979)

W. Gunßer Friedrich Schmidt Г. Н. Белозерский M. Kasakov

Superparamagnetism

Ferrimagnetism

10.1007/978-3-642-81344-3_187

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Observation of Superparamagnetism by the Mössbauer Effect

Journal of Applied Physics (1965)

W. J. Schuele S. Shtrikman D. Treves

Mossbauer spectra of 57Fe in ultrafine NiFe2O4 and CoFe2O4 powders were studied, as a function of crystallite size and temperature. The hyperfine field was found to collapse at a temperature, lower then the Curie points which decreased with particle size. This collapse of the hyperfine field is interpreted as motional narrowing due to the onset of superparamagnetism.

Superparamagnetism

10.1063/1.1714075

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Crystal order and magnetic properties of Fe2.4V0.6Al alloy studied by magnetostatic and Mössbauer methods

Nukleonika (2003)

E. Popiel W. Zarek Z. Kapuśniak M. Tuszyński

Crystal (programming language)

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Mossbauer spectroscopy under magnetic field : surface disorder and anisotropy of nickel ferrite nanoparticles