Magnetic microstructure of iron sulfide crystals in magnetotactic bacteria from off-axis electron holography

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• 作者：T. Kasama ; M. Pó ; sfai ; R.K.K. Chong ; A.P. Finlayson ; R.E. Dunin-Borkowski and R.B. Frankel
• 关键词：Greigite ; Magnetosomes ; Magnetotactic bacteria ; Magnetic microstructure
• 刊名：Physica B
• 出版年：2006
• 期刊代码：53_09214526
• 类别：ph
• 出版时间：1 October 2006
• 卷：384
• 期：1-2
• 页码：249-252
• 文件大小：402 K

摘要

Transmission electron microscopy, off-axis electron holography and energy-selected imaging were used to study the crystallography, morphology, and magnetic microstructure of nanoscale greigite (Fe₃S₄) magnetosomes in magnetotactic bacteria from a sulfidic habitat. The greigite magnetosomes were organized in chains, but were less ordered than magnetite magnetosomes in other bacteria. Nevertheless, the magnetosomes comprise a permanent magnetic dipole, sufficient for magnetotaxis.