Paleomagnetic recording fidelity of nonideal magnetic systems
Abstract A suite of near‐identical magnetite nanodot samples produced by electron‐beam lithography have been used to test the thermomagnetic recording fidelity of particles in the 74–333 nm size range; the grain size range most commonly found in rocks. In addition to controlled grain size, the sampl...
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| Format: | Article |
| Language: | English |
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Wiley
2014-06-01
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| Series: | Geochemistry, Geophysics, Geosystems |
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| Online Access: | https://doi.org/10.1002/2014GC005249 |
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| author | Adrian R. Muxworthy David Krása Wyn Williams Trevor P. Almeida |
| author_facet | Adrian R. Muxworthy David Krása Wyn Williams Trevor P. Almeida |
| author_sort | Adrian R. Muxworthy |
| collection | DOAJ |
| description | Abstract A suite of near‐identical magnetite nanodot samples produced by electron‐beam lithography have been used to test the thermomagnetic recording fidelity of particles in the 74–333 nm size range; the grain size range most commonly found in rocks. In addition to controlled grain size, the samples had identical particle spacings, meaning that intergrain magnetostatic interactions could be controlled. Their magnetic hysteresis parameters were indicative of particles thought not to be ideal magnetic recorders; however, the samples were found to be excellent thermomagnetic recorders of the magnetic field direction. They were also found to be relatively good recorders of the field intensity in a standard paleointensity experiment. The samples' intensities were all within ∼15% of the expected answer and the mean of the samples within 3% of the actual field. These nonideal magnetic systems have been shown to be reliable records of the geomagnetic field in terms of both direction and intensity even though their magnetic hysteresis characteristics indicate less than ideal magnetic grains. |
| format | Article |
| id | doaj-art-99a58bf2cdcd4258a2002366a5a5b2a1 |
| institution | OA Journals |
| issn | 1525-2027 |
| language | English |
| publishDate | 2014-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geochemistry, Geophysics, Geosystems |
| spelling | doaj-art-99a58bf2cdcd4258a2002366a5a5b2a12025-08-20T02:35:19ZengWileyGeochemistry, Geophysics, Geosystems1525-20272014-06-011562254226110.1002/2014GC005249Paleomagnetic recording fidelity of nonideal magnetic systemsAdrian R. Muxworthy0David Krása1Wyn Williams2Trevor P. Almeida3Department of Earth Science and EngineeringImperial College LondonLondon UKEuropean Research Council Executive AgencyBrussels BelgiumSchool of GeoSciencesUniversity of EdinburghEdinburgh UKDepartment of Earth Science and EngineeringImperial College LondonLondon UKAbstract A suite of near‐identical magnetite nanodot samples produced by electron‐beam lithography have been used to test the thermomagnetic recording fidelity of particles in the 74–333 nm size range; the grain size range most commonly found in rocks. In addition to controlled grain size, the samples had identical particle spacings, meaning that intergrain magnetostatic interactions could be controlled. Their magnetic hysteresis parameters were indicative of particles thought not to be ideal magnetic recorders; however, the samples were found to be excellent thermomagnetic recorders of the magnetic field direction. They were also found to be relatively good recorders of the field intensity in a standard paleointensity experiment. The samples' intensities were all within ∼15% of the expected answer and the mean of the samples within 3% of the actual field. These nonideal magnetic systems have been shown to be reliable records of the geomagnetic field in terms of both direction and intensity even though their magnetic hysteresis characteristics indicate less than ideal magnetic grains.https://doi.org/10.1002/2014GC005249thermoremanencepaleointensitymagnetitethin filmspseudo‐single domain |
| spellingShingle | Adrian R. Muxworthy David Krása Wyn Williams Trevor P. Almeida Paleomagnetic recording fidelity of nonideal magnetic systems Geochemistry, Geophysics, Geosystems thermoremanence paleointensity magnetite thin films pseudo‐single domain |
| title | Paleomagnetic recording fidelity of nonideal magnetic systems |
| title_full | Paleomagnetic recording fidelity of nonideal magnetic systems |
| title_fullStr | Paleomagnetic recording fidelity of nonideal magnetic systems |
| title_full_unstemmed | Paleomagnetic recording fidelity of nonideal magnetic systems |
| title_short | Paleomagnetic recording fidelity of nonideal magnetic systems |
| title_sort | paleomagnetic recording fidelity of nonideal magnetic systems |
| topic | thermoremanence paleointensity magnetite thin films pseudo‐single domain |
| url | https://doi.org/10.1002/2014GC005249 |
| work_keys_str_mv | AT adrianrmuxworthy paleomagneticrecordingfidelityofnonidealmagneticsystems AT davidkrasa paleomagneticrecordingfidelityofnonidealmagneticsystems AT wynwilliams paleomagneticrecordingfidelityofnonidealmagneticsystems AT trevorpalmeida paleomagneticrecordingfidelityofnonidealmagneticsystems |