Moessbauer spectra of nanomagnets within rotating hyperfine field

M. A. Chuev; N. P. Aksenova; P. G. Medvedev

doi:10.1117/12.683288

10 June 2006 Moessbauer spectra of nanomagnets within rotating hyperfine field

M. A. Chuev, N. P. Aksenova, P. G. Medvedev

Proceedings Volume 6260, Micro- and Nanoelectronics 2005; 62600V (2006) https://doi.org/10.1117/12.683288
Event: Micro- and Nanoelectronics 2005, 2005, Zvenigorod, Russian Federation

Abstract

The vast majority of experimental Moessbauer spectra of nanomagnets are treated within a static hyperfine structure for which the line positions and intensities can be described in terms of static magnetic fields acting on nuclei. As has been recently found, the rotation of magnetic moments of nanoparticles results in a renormalisation of the nuclear g-factors, accompanied by a qualitative transformation of absorption spectra. In particular, along with magnetic sextet well known in the Moessbauer spectroscopy of ⁵⁷Fe isotope, partial spectra consisting of 'magnetic' quintuplet, quartet, triplet and even doublet of lines can be formed. Such a transformation of Moessbauer spectra depends not only on the magnitude of the rotation frequency but also on its sign, which, in turn, may be dictated by the shape and constants of magnetic anisotropy. The predicted effects can essentially modify the conventional scheme of analysis of experimental Moessbauer spectra of nanomagnets.

Citation Download Citation

M. A. Chuev, N. P. Aksenova, and P. G. Medvedev "Moessbauer spectra of nanomagnets within rotating hyperfine field", Proc. SPIE 6260, Micro- and Nanoelectronics 2005, 62600V (10 June 2006); https://doi.org/10.1117/12.683288

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