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Magnetic separation of polymer hybrid iron oxide nanoparticles triggered by temperature

Yabin Sun1, Xiaobin Ding, Zhaohui Zheng

  • 1Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, PR China.

Chemical Communications (Cambridge, England)
|October 3, 2006
PubMed

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Materials like iron, nickel, and cobalt consist of magnetic domains, within which the magnetic dipoles are arranged parallel to each other. The magnetic dipoles are rigidly aligned in the same direction within a domain by quantum mechanical coupling among the atoms. This coupling is so strong that even thermal agitation at room temperature cannot break it. The result is that each domain has a net dipole moment. However, some materials have weaker coupling, and are ferromagnetic at lower...