A new three-axis vibrating sample magnetometer for continuous high-temperature magnetization measurements: applications to paleo- and archeo-intensity determinations

Details A new three-axis vibrating sample magnetometer for continuous high-temperature magnetization measurements: applications to paleo- and archeo-intensity determinations A new three-axis vibrating sample magnetometer for continuous high-temperature magnetization measurements: applications to paleo- and archeo-intensity determinations

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004e%26psl.229...31l&link_type=abstract

Earth and Planetary Science Letters, Volume 229, Issue 1-2, p. 31-43.

Physics

18

Magnetometer, Paleo-Intensity, Archeomagnetism, Cooling Rate, Anisotropy

Scientific paper

We have developed a new three-axis vibrating sample magnetometer, which allows continuous high-temperature magnetization measurements of individual cylindrical ˜0.75 cm3 samples up to ˜650 °C and the acquisition of thermoremanent magnetization (TRM) in any direction and field intensity up to 200 μT. We propose a fast (less than 2.5 h) automated experimental procedure adapted from Boyd's [Nature 319 (1986) 208 209] modified version of the Thellier and Thellier [Ann. Geophys. 15 (1959) 285 376] method which provides continuous intensity determinations over a large (typically 300 °C) temperature interval for each sample. This procedure allows one to take into account both the cooling rate dependence of TRM acquisition and anisotropy of TRM. Several examples of analyses of ancient magnetization demonstrate the quality and reliability of the data and illustrate the promising potential of this new instrument in paleo- and archeomagnetism.

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