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Article
Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography
Science
Publication Date
12-4-1998
Abstract
Off-axis electron holography in the transmission electron microscope was used to correlate the physical and magnetic microstructure of magnetite nanocrystals in magnetotactic bacteria. The magnetite crystals were all single magnetic domains, and the magnetization directions of small superparamagnetic crystals were constrained by magnetic interactions with larger crystals in the chains. Shape anisotropy was found to dominate magnetocrystalline anisotropy in elongated crystals. A coercive field between 300 and 450 oersted was determined for one chain.
Disciplines
Copyright
1998 American Association for the Advancement of Science.
Citation Information
Rafal E. Dunin-Borkowski, Martha R. McCartney, Richard B. Frankel, Dennis A. Bazylinski, et al.. "Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography" Science Vol. 282 Iss. 5395 (1998) p. 1868 - 1870 Available at: http://works.bepress.com/rfrankel/76/