Alphandéry E, Ding Y, Ngo A T, Wang Z L, Wu L F, Pileni M P
Universite Pierre et Marie-Curie, Laboratoire des materiaux mesoscopiques et nanometriques (LM2N), 4 place Jussieu, Paris cedex 05, France.
ACS Nano. 2009 Jun 23;3(6):1539-47. doi: 10.1021/nn900289n.
The origin of the magnetic anisotropy is explained in an assembly of aligned magnetic nanoparticles. For that, nanoparticles synthesized biologically by Magnetospirillum magneticum AMB-1 magnetotactic bacteria are used. For the first time, it is possible to differentiate between the two contributions arising from the alignment of the magnetosome easy axes and the strength of the magnetosome dipolar interactions. The magnetic anisotropy is shown to arise mainly from the dipolar interactions between the magnetosomes.
磁性各向异性的起源在排列整齐的磁性纳米颗粒集合中得到了解释。为此，使用了由趋磁螺菌AMB-1趋磁细菌生物合成的纳米颗粒。首次能够区分磁小体易轴排列和磁小体偶极相互作用强度产生的两种贡献。结果表明，磁性各向异性主要源于磁小体之间的偶极相互作用。
