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A new type of a three-component spinner magnetometer to measure the remanence of rocks at elevated temperature

Wack, Michael, and Jürgen Matzka (2007), A new type of a three-component spinner magnetometer to measure the remanence of rocks at elevated temperature, EPS Special Issue "Perspectives of Geomagnetism", 59, 853–862.

Abstract
A new instrument to continuously determine the remanent magnetisation of standard paleomagnetic
(inch-sized) rock samples during heating and cooling (continuous thermal demagnetisation)
was developed. The design as an off-axis spinner magnetometer (i.e. the samples rotate
on a circular path in a radial distance to the spinning axis) allows the simultaneous measurement
of several samples and offers a way to determine the full vector of magnetisation. Six
fluxgate sensors are used to record three gradients of the magnetic fields caused by the samples
and the vector of remanence is determined by regression analysis of the gradient signals. The
sensitivity of the instrument is 2E-7 Am². Hot air is circulating through copper pipes which
heat the samples by thermal radiation to avoid magnetic fields which would arise from direct
electrical heating. Currently, the measurements are restricted to a maximum of 350 °C. The instrument
was tested with oceanic basalt samples that were given an artificial remanence. Some
continuous thermal demagnetisation experiments of this artificial remanence and of the natural
remanent magnetisations are shown for oceanic basalts.
Further information
BibTeX
@article{id893,
  author = {Michael Wack and J{\"u}rgen Matzka},
  journal = {EPS Special Issue "Perspectives of Geomagnetism"},
  month = {jul},
  pages = {853{--}862},
  title = {{A new type of a three-component spinner magnetometer to measure the remanence of rocks at elevated temperature}},
  volume = {59},
  year = {2007},
  language = {en},
  url = {http://www.terrapub.co.jp/journals/EPS/abstract/5907/59070853.html},
}
EndNote
%0 Journal Article
%A Wack, Michael
%A Matzka, Jürgen
%D 2007
%V 59
%J EPS Special Issue "Perspectives of Geomagnetism"
%P 853–862
%T A new type of a three-component spinner magnetometer to measure the remanence of rocks at elevated temperature
%U http://www.terrapub.co.jp/journals/EPS/abstract/5907/59070853.html
%8 jul
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