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An ultra-low magnetic field thermal demagnetizer for high-precision paleomagnetism

Qin, Huafeng; zhao, xiang; Liu, Shuangchi; Paterson, Greig A.; Jiang, Zhaoxia; Cai, Shuhui; Li, Jinhua; Liu, Qingsong; Zhu, Rixiang

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Thermal demagnetization furnaces are widely used paleomagnetic facilities for progressive removal of naturally acquired magnetic remanence or the imparting of well-controlled laboratory magnetization. An ideal thermal demagnetizer should maintain "zero" magnetic field in the sample chamber during thermal treatments. However, magnetic field noises, including the residual magnetic fields of the construction material and the induced fields caused by the alternating current (AC) in the heating...[Show more]

dc.contributor.authorQin, Huafeng
dc.contributor.authorzhao, xiang
dc.contributor.authorLiu, Shuangchi
dc.contributor.authorPaterson, Greig A.
dc.contributor.authorJiang, Zhaoxia
dc.contributor.authorCai, Shuhui
dc.contributor.authorLi, Jinhua
dc.contributor.authorLiu, Qingsong
dc.contributor.authorZhu, Rixiang
dc.date.accessioned2022-04-28T03:30:20Z
dc.date.available2022-04-28T03:30:20Z
dc.identifier.issn1880-5981
dc.identifier.urihttp://hdl.handle.net/1885/264154
dc.description.abstractThermal demagnetization furnaces are widely used paleomagnetic facilities for progressive removal of naturally acquired magnetic remanence or the imparting of well-controlled laboratory magnetization. An ideal thermal demagnetizer should maintain "zero" magnetic field in the sample chamber during thermal treatments. However, magnetic field noises, including the residual magnetic fields of the construction material and the induced fields caused by the alternating current (AC) in the heating element are always present, which can contaminate the paleomagnetic results at the elevated temperatures or especially for the magnetically weak samples. Here, we designed a new structure of heating wire named "straight core solenoid" to develop a new demagnetization furnace with ultra-low magnetic field noise. Simulation and practical measurements show that the heating current magnetic field can be greatly reduced by using the new technology. Thermal demagnetization experiments demonstrate that the new demagnetizer can yield low noise results even for weakly magnetic samples.
dc.description.sponsorshipThis work was supported by NSFC grants 41674073 and the Project of National Deep Exploration Technology and Experimental Research (Grant number: SinoProbe-09–02(201011079)). G.A.P. acknowledges funding from a NERC Independent Research Fellowship (NE/P017266/1).
dc.format.mimetypeapplication/pdf
dc.language.isoen_AU
dc.publisherSpringerOpen
dc.rights© The Author(s) 2020
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.sourceEarth, Planets and Space
dc.subjectPaleomagnetism
dc.subjectThermal demagnetization
dc.subjectFurnace
dc.subjectAC magnetic field
dc.subjectResidual magnetic field
dc.subjectHeating wire structure
dc.subjectStraight core solenoid
dc.titleAn ultra-low magnetic field thermal demagnetizer for high-precision paleomagnetism
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume72
dc.date.issued2020
local.identifier.absfor040406 - Magnetism and Palaeomagnetism
local.identifier.ariespublicationa383154xPUB15717
local.publisher.urlhttps://earth-planets-space.springeropen.com/
local.type.statusPublished Version
local.contributor.affiliationQin, Huafeng, Chinese Academy of Sciences
local.contributor.affiliationZhao, Xiang, College of Science, ANU
local.contributor.affiliationLiu, Shuangchi, Chinese Academy of Sciences
local.contributor.affiliationPaterson, Greig A., Chinese Academy of Sciences
local.contributor.affiliationJiang, Zhaoxia, Chinese Academy of Sciences
local.contributor.affiliationCai, Shuhui, Chinese Academy of Sciences
local.contributor.affiliationLi, Jinhua, Chinese Academy of Sciences
local.contributor.affiliationLiu, Qingsong, Chinese Academy of Sciences
local.contributor.affiliationZhu, Rixiang, Chinese Academy of Sciences
local.bibliographicCitation.issue1
local.bibliographicCitation.startpage1
local.bibliographicCitation.lastpage12
local.identifier.doi10.1186/s40623-020-01304-0
local.identifier.absseo970102 - Expanding Knowledge in the Physical Sciences
local.identifier.absseo970104 - Expanding Knowledge in the Earth Sciences
dc.date.updated2020-12-27T07:21:05Z
dcterms.accessRightsOpen Access
dc.provenanceThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativeco mmons.org/licenses/by/4.0/.
dc.rights.licenseCreative Commons
CollectionsANU Research Publications

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