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Growth and magnetic properties of oriented alpha-Fe2O3 nanorods

Jih-Jen Wu1, Ya-Lien Lee, Hsuen-Han Chiang

  • 1Department of Chemical Engineering, National Cheng Kung University, Tainan 701, Taiwan. wujj@mail.ncku.edu.tw

The Journal of Physical Chemistry. B
|September 15, 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...