The dynamical behavior of g-Fe 2 O 3 particles dispersed in a polymer have been investigated by a.c. susceptibility and Mo Β¨ssbauer spectroscopy measurements. The effect of interparticle interactions on the relaxation time is satisfactorily described by a superparamagnetic model where the dipolar en
Dynamical behavior of two interacting magnetic nanoparticles
β Scribed by D. Laroze; P. Vargas
- Publisher
- Elsevier Science
- Year
- 2006
- Tongue
- English
- Weight
- 417 KB
- Volume
- 372
- Category
- Article
- ISSN
- 0921-4526
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β¦ Synopsis
In the present work, we study the deterministic spin dynamic of a two interacting magnetic particles, with both dipolar and exchange interactions in the presence of an applied magnetic field. Due to the strength ratio of interactions, two time scales appear; a longer one associated with the exchange interaction and a shorter time scale associated with the dipolar interaction. We find that the magnitude of the total system magnetization is not constant; furthermore it is a fluctuating time-dependent function.
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