Identification of the Magnetic Poles on Strong Magnetic Grains from Meteorites using Magnetotactic Bacteria

M. Funaki, H. Sakai, Tadashi Matsunaga

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

Magnetotactic bacteria (north seeking bacteria) have been used to identify the magnetic S pole of iron-nickel grains selected from St. Séverin LL6 chondrite. The results indicate that the bacteria are sensitive magnetic sensors which can be used to detect not only the S pole in the grains but also the directions of lines of magnetic force radiated from the grains. The magnetic coercive force and the stability of natural remanent magnetization can also be measured with the bacteria by applying a steady magnetic field. These methods can in principle be applied to terrestrial rocks having relatively strong natural remanent magnetization. Thus, the magnetotactic bacteria can give useful information for rock magnetism and paleomagnetism as a bio-magnetometer. Combining the method of south seeking bacteria and Bitter pattern analyses using colloidal magnetite particles, complex magnetization structures on the surface of Fe-Ni grains from the St. Séverin meteorite have been revealed, which is important for an understanding the chondrite magnetism.

Original languageEnglish
Pages (from-to)77-87
Number of pages11
JournalJournal of Geomagnetism and Geoelectricity
Volume41
Issue number1
DOIs
Publication statusPublished - 1989
Externally publishedYes

Fingerprint

magnetic poles
meteorites
meteorite
bacteria
bacterium
natural remanent magnetization
chondrites
chondrite
magnetization
poles
rocks
paleomagnetism
magnetometer
magnetite
rock
magnetometers
nickel
sensor
magnetic field
iron

ASJC Scopus subject areas

  • Earth and Planetary Sciences(all)

Cite this

Identification of the Magnetic Poles on Strong Magnetic Grains from Meteorites using Magnetotactic Bacteria. / Funaki, M.; Sakai, H.; Matsunaga, Tadashi.

In: Journal of Geomagnetism and Geoelectricity, Vol. 41, No. 1, 1989, p. 77-87.

Research output: Contribution to journalArticle

@article{79ff29ac42c247299793011de04fbea5,
title = "Identification of the Magnetic Poles on Strong Magnetic Grains from Meteorites using Magnetotactic Bacteria",
abstract = "Magnetotactic bacteria (north seeking bacteria) have been used to identify the magnetic S pole of iron-nickel grains selected from St. S{\'e}verin LL6 chondrite. The results indicate that the bacteria are sensitive magnetic sensors which can be used to detect not only the S pole in the grains but also the directions of lines of magnetic force radiated from the grains. The magnetic coercive force and the stability of natural remanent magnetization can also be measured with the bacteria by applying a steady magnetic field. These methods can in principle be applied to terrestrial rocks having relatively strong natural remanent magnetization. Thus, the magnetotactic bacteria can give useful information for rock magnetism and paleomagnetism as a bio-magnetometer. Combining the method of south seeking bacteria and Bitter pattern analyses using colloidal magnetite particles, complex magnetization structures on the surface of Fe-Ni grains from the St. S{\'e}verin meteorite have been revealed, which is important for an understanding the chondrite magnetism.",
author = "M. Funaki and H. Sakai and Tadashi Matsunaga",
year = "1989",
doi = "10.5636/jgg.41.77",
language = "English",
volume = "41",
pages = "77--87",
journal = "Earth, Planets and Space",
issn = "1343-8832",
publisher = "Terra Scientific Publishing Company",
number = "1",

}

TY - JOUR

T1 - Identification of the Magnetic Poles on Strong Magnetic Grains from Meteorites using Magnetotactic Bacteria

AU - Funaki, M.

AU - Sakai, H.

AU - Matsunaga, Tadashi

PY - 1989

Y1 - 1989

N2 - Magnetotactic bacteria (north seeking bacteria) have been used to identify the magnetic S pole of iron-nickel grains selected from St. Séverin LL6 chondrite. The results indicate that the bacteria are sensitive magnetic sensors which can be used to detect not only the S pole in the grains but also the directions of lines of magnetic force radiated from the grains. The magnetic coercive force and the stability of natural remanent magnetization can also be measured with the bacteria by applying a steady magnetic field. These methods can in principle be applied to terrestrial rocks having relatively strong natural remanent magnetization. Thus, the magnetotactic bacteria can give useful information for rock magnetism and paleomagnetism as a bio-magnetometer. Combining the method of south seeking bacteria and Bitter pattern analyses using colloidal magnetite particles, complex magnetization structures on the surface of Fe-Ni grains from the St. Séverin meteorite have been revealed, which is important for an understanding the chondrite magnetism.

AB - Magnetotactic bacteria (north seeking bacteria) have been used to identify the magnetic S pole of iron-nickel grains selected from St. Séverin LL6 chondrite. The results indicate that the bacteria are sensitive magnetic sensors which can be used to detect not only the S pole in the grains but also the directions of lines of magnetic force radiated from the grains. The magnetic coercive force and the stability of natural remanent magnetization can also be measured with the bacteria by applying a steady magnetic field. These methods can in principle be applied to terrestrial rocks having relatively strong natural remanent magnetization. Thus, the magnetotactic bacteria can give useful information for rock magnetism and paleomagnetism as a bio-magnetometer. Combining the method of south seeking bacteria and Bitter pattern analyses using colloidal magnetite particles, complex magnetization structures on the surface of Fe-Ni grains from the St. Séverin meteorite have been revealed, which is important for an understanding the chondrite magnetism.

UR - http://www.scopus.com/inward/record.url?scp=0024944295&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0024944295&partnerID=8YFLogxK

U2 - 10.5636/jgg.41.77

DO - 10.5636/jgg.41.77

M3 - Article

AN - SCOPUS:0024944295

VL - 41

SP - 77

EP - 87

JO - Earth, Planets and Space

JF - Earth, Planets and Space

SN - 1343-8832

IS - 1

ER -