Abstract
Twelve grain-size fractions, ranging from 250 ~tm down to <5 ~m, of four natural pyrrhotite samples were
homogeneously dispersed in a non-magnetic matrix to study their magnetic behaviour during thermal demagnetization
and low-temperature treatment.
Normalized decay curves of the isothermal saturation remanence (Jrs) obtained by continuous thermal demagnetization
are identical for all samples studied.
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