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Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography

Dunin-Borkowski, R. E. and McCartney, Martha R. and Frankel, Richard B. and Bazylinski, Dennis A. and Pósfai, Mihály and Buseck, Peter R. (1998) Magnetic Microstructure of Magnetotactic Bacteria by Electron Holography. Science, 282 (5395). pp. 1868-1870. ISSN 0036-8075 (print), 1095-9203 (online)

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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.

Item Type: Article
Subjects: Q Science / természettudomány > QD Chemistry / kémia > QD06 Mineralogy / ásványtan
Q Science / természettudomány > QE Geology / földtudományok
Depositing User: Erika Bilicsi
Date Deposited: 21 Nov 2012 12:21
Last Modified: 21 Nov 2012 12:21
URI: http://real.mtak.hu/id/eprint/3422

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