Magnetic microstructure of magnetotactic bacteria by electron holography

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

Research output: Contribution to journalArticlepeer-review

309 Scopus citations

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 (US)
Pages (from-to)1868-1870
Number of pages3
JournalScience
Volume282
Issue number5395
DOIs
StatePublished - Dec 4 1998

ASJC Scopus subject areas

  • General

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