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EOS VOLUME 88 NUMBER 21 22 MAY 2007 A primary method of characterizing the
 

Summary: 230
EOS VOLUME 88 NUMBER 21 22 MAY 2007
A primary method of characterizing the
magnetic properties of a sample is to mea-
sure its magnetization while gradually varying
an applied ambient magnetic field between
large positive values and large negative values.
The change in magnetization with field can
be used to map the magnetic hysteresis loop
of the sample, which defines some of its bulk
magnetic properties (Figure 1).
Each sample, however, is actually com-
posed of a population of magnetic grains
and domains, which may vary in their mag-
netic properties and which may interact
with their neighbors. The micromagnetic
properties of these populations, such as
the distribution of micro-coercivities and
the magnetic interactions or biases, can be
mapped by probing the interior of a hys-

  

Source: Acton, Gary - Department of Geology, University of California, Davis

 

Collections: Geosciences