Magnetic microstructure of magnetotactic bacteria by electron holography

Rafal E. Dunin-Borkowski, Martha R. McCartney, Richard B. Frankel, Dennis A. Bazylinski, M. Pósfai, Peter R. Buseck

Research output: Contribution to journalArticle

296 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)1868-1870
Number of pages3
JournalScience
Volume282
Issue number5395
Publication statusPublished - Dec 4 1998

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holography
bacteria
microstructure
magnetite
crystals
electrons
anisotropy
magnetic domains
nanocrystals
electron microscopes
magnetization
interactions

ASJC Scopus subject areas

  • General

Cite this

Dunin-Borkowski, R. E., McCartney, M. R., Frankel, R. B., Bazylinski, D. A., Pósfai, M., & Buseck, P. R. (1998). Magnetic microstructure of magnetotactic bacteria by electron holography. Science, 282(5395), 1868-1870.

Magnetic microstructure of magnetotactic bacteria by electron holography. / Dunin-Borkowski, Rafal E.; McCartney, Martha R.; Frankel, Richard B.; Bazylinski, Dennis A.; Pósfai, M.; Buseck, Peter R.

In: Science, Vol. 282, No. 5395, 04.12.1998, p. 1868-1870.

Research output: Contribution to journalArticle

Dunin-Borkowski, RE, McCartney, MR, Frankel, RB, Bazylinski, DA, Pósfai, M & Buseck, PR 1998, 'Magnetic microstructure of magnetotactic bacteria by electron holography', Science, vol. 282, no. 5395, pp. 1868-1870.
Dunin-Borkowski RE, McCartney MR, Frankel RB, Bazylinski DA, Pósfai M, Buseck PR. Magnetic microstructure of magnetotactic bacteria by electron holography. Science. 1998 Dec 4;282(5395):1868-1870.
Dunin-Borkowski, Rafal E. ; McCartney, Martha R. ; Frankel, Richard B. ; Bazylinski, Dennis A. ; Pósfai, M. ; Buseck, Peter R. / Magnetic microstructure of magnetotactic bacteria by electron holography. In: Science. 1998 ; Vol. 282, No. 5395. pp. 1868-1870.
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