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Magnetic microstructure of bacterial magnetite by electron holography

Martha R. McCartney, Ulysses Lins, Marcos Farina, Peter R. Buseck and Richard B. Frankel
Magnetic microstructure of bacterial magnetite by electron holography (in Biogenic iron minerals, Mihaly Posfai (prefacer))
European Journal of Mineralogy (August 2001) 13 (4): 685-689


A brackish lagoon at Itaipu, Brazil, contains magnetotactic bacteria with unusually large magnetite magnetosomes (lengths 100-200 nm). The micromagnetic structures of the magnetosomes from two different coccoid organisms from the lagoon have been determined by electron holography. The results are consistent with single-magnetic-domain structure in the elongated magnetosomes from one organism and metastable, single-magnetic-domain structure in the larger, more equi-axed, magnetosomes from the other organism. The results are consistent with theoretical predictions of the transition dimension between stable and metastable single-domain structure in magnetite.

ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 13
Serial Issue: 4
Title: Magnetic microstructure of bacterial magnetite by electron holography
Title: Biogenic iron minerals
Affiliation: Arizona State University, Center for Solid State Science, Tempe, AZ, United States
Affiliation: University of Veszprem, Hungary
Pages: 685-689
Published: 200108
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
Meeting name: Biogenic iron minerals symposium and workshop
Meeting location: Tihany, HUN, Hungary
Meeting date: 20000520May 20-23, 2000
References: 15
Accession Number: 2001-065622
Categories: Mineralogy of non-silicates
Document Type: Serial Conference document
Bibliographic Level: Analytic
Illustration Description: illus.
S34°00'00" - N05°15'00", W74°00'00" - W34°00'00"
Secondary Affiliation: Universidade Federal do Rio de Janeiro, BRA, BrazilCalifornia Polytechnic State University, USA, United States
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2020, American Geosciences Institute.
Update Code: 200120
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