Magnetic material in head, thorax, and abdomen of Solenopsis substituta ants: A ferromagnetic resonance study

Ferromagnetic resonance temperature dependence is used to study the magnetic material in smashed head, thorax, and abdomen of Solenopsis substituta ants. These three body parts present the five lines previously observed in other social insects. The magnetic material content is slightly higher in hea...

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Bibliographic Details
Published in:Journal of magnetic resonance (1997) 2005-08, Vol.175 (2), p.309-316
Main Authors: Abraçado, L.G., Esquivel, D.M.S., Alves, O.C., Wajnberg, E.
Format: Article
Language:English
Subjects:
Abdomen
Animals
Ants - chemistry
Fire ants
FMR
Head
Iron - metabolism
Magnetic nanoparticles
Magnetic volume
Magnetics
Signal Processing, Computer-Assisted
Temperature
Temperature transitions
Thorax - chemistry
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Summary:Ferromagnetic resonance temperature dependence is used to study the magnetic material in smashed head, thorax, and abdomen of Solenopsis substituta ants. These three body parts present the five lines previously observed in other social insects. The magnetic material content is slightly higher in heads with antennae than in abdomen with petiole. Isolated nanoparticle diameters were estimated as 12.5 ± 0.1 and 11.0 ± 0.2 nm in abdomen with petiole and head with antennae, respectively. The presence of linear chains of these particles or large ellipsoidal particles are suggested. A bulk-like magnetite particle was observed in the thorax. The Curie–Weiss, the structural–electronic and ordering transition temperatures were obtained in good agreement with those proposed for magnetite nanoparticles.
ISSN:1090-7807
1096-0856
DOI:10.1016/j.jmr.2005.05.006