Saved in:
| Main Author: | |
|---|---|
| Format: | Artículo científico |
| Language: | en |
| Published: |
Sociedade Brasileira de Física
2001
|
| Subjects: | |
| Online Access: | https://www.redalyc.org/articulo.oa?id=46413502011 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Table of Contents:
- Mössbauer spectroscopy, superparamagnetism and ferrofluids H.-D. Pfannes J. H. Dias Filho R. Magalhães-Paniago J. L. López R. Paniago Física, Astronomía y Matemáticas Some fundamentals of Mössbauer spectroscopy and of fluctuating magnetic hyperfine interactions are reviewed. An expression for calculation of spin-phonon interaction transition probabilities on the ground of a Debye model is given. Basic ideas of superparamagnetism and classical results for low-temperature relaxation rates are presented. A theory of superparamagnetism based on spin-phonon interaction is introduced. It is shown how to calculate from this Mössbauer spectra taking all spin-levels into account. Experimental spectra of ferrofluids are compared with simulated spectra and found in good accordance. 2001 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46413502011 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.3 Vol.31