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@ARTICLE{Almeida:827059,
author = {Almeida, T. P. and Muxworthy, A. R. and Kovacs, Andras and
Williams, W. and Nagy, L. and Conbhuí, P.Ò and Frandsen,
C. and Supakulopas, R. and Dunin-Borkowski, Rafal},
title = {{D}irect observation of the thermal demagnetization of a
vortex structure held by a non-ideal magnetite recorder},
journal = {Geophysical research letters},
volume = {43},
number = {16},
issn = {0094-8276},
address = {Hoboken, NJ},
publisher = {Wiley},
reportid = {FZJ-2017-01265},
pages = {8426 - 8434},
year = {2016},
abstract = {The thermal demagnetization of pseudo-single-domain (PSD)
magnetite (Fe3O4) particles, which govern the magnetic
signal in many igneous rocks, is examined using off-axis
electron holography. Visualization of a vortex structure
held by an individual Fe3O4 particle (~250 nm in diameter)
during in situ heating is achieved through the construction
and examination of magnetic-induction maps. Stepwise
demagnetization of the remanence-induced Fe3O4 particle upon
heating to above the Curie temperature, performed in a
similar fashion to bulk thermal demagnetization
measurements, revealed that its vortex state remains stable
under heating close to its unblocking temperature and is
recovered upon cooling with the same or reversed vorticity.
Hence, the PSD Fe3O4 particle exhibits thermomagnetic
behavior comparable to a single-domain carrier, and thus,
vortex states are considered reliable magnetic recorders for
paleomagnetic investigations},
cin = {PGI-5 / ER-C-1},
ddc = {550},
cid = {I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)ER-C-1-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000384443800012},
pubmed = {pmid:27867236},
doi = {10.1002/2016GL070074},
url = {https://juser.fz-juelich.de/record/827059},
}