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A New Method for Direct Determination of the Recoilless Fraction with Application to Magnetic Nanoparticles

Published online by Cambridge University Press:  01 February 2011

Monica Sorescu
Monica Sorescu*
Affiliation:
Duquesne University, Department of Physics, Bayer Center, Pittsburgh, PA 15282, U.S.A.
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Abstract

We propose a two-lattice method for direct determination of the recoilless fraction using a single room-temperature transmission Mössbauer measurement. The method is first demonstrated for the case of iron and metallic glass two-foil system and is next generalized for the case of physical mixtures of two powders. We further apply this method to determine the recoilless fraction of hematite and magnetite particles. Finally, we provide direct measurement of the recoilless fraction in nanohematite and nanomagnetite with an average particle size of 19 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 721: Symposia E/J – Texture and Microstructure in Electronic and Magnetic Films – Nanostructural Magnetic Materials for Data Storage , 2002 , E3.7
Copyright
Copyright © Materials Research Society 2002

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References

[1] Gonser, U., Mössbauer Spectroscopy (Springer Verlag, Berlin, 1975), Vol. 5, p. 15.Google Scholar
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[4] Sorescu, M., Mater. Lett., in press.Google Scholar
[5] Sorescu, M., J. Mat. Res., in press.Google Scholar
[6] Sorescu, M., J. Nanopart. Res. 2, 305 (2000).Google Scholar