On the effect of low-temperature demagnetization on TRMs and pTRMs

V. V. Shcherbakova*, V. P. Shcherbakov, P. W. Schmidt, M. Prevot

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    Low-temperature demagnetization (LTD) experiments with TRMs and pTRMs using liquid nitrogen were carried out on samples with different (MD and PSD) domain structures to infer and to compare the type of domain structure of samples before and after LTD judged by the thermomagnetic criterion. This is based on testing materials against Thellier's law of independence of pTRMs. The results demonstrate good agreement between the commonly used criteria for differentiating domain structure, such as Qrt, Hcr/Hc and Irs/Is factors, and more sophisticated ones, such as the thermomagnetic criterion and LTD treatment. It is noteworthy that there is no observable tendency of MD or PSD samples to display SD-type pTRM=f(T) curves after LTD treatment. Hence our experiments failed to detect a quasi-SD component of remanence acquiring TRM by thermofluctuations in MD or PSD grains in the manner of Verhoogen (1959) and Stacey & Banerjee (1974) hypotheses.

    Original languageEnglish
    Pages (from-to)379-386
    Number of pages8
    JournalGeophysical Journal International
    Volume127
    Issue number2
    Publication statusPublished - 1996

    Keywords

    • Demagnetization
    • Domain structure
    • Remanent magnetization

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