Jl. Mattei et al., MAGNETIC-BEHAVIOR OF HETEROGENEOUS MAGNETIC-MATERIALS, IEEE transactions on instrumentation and measurement, 42(2), 1993, pp. 121-125
This paper is a study of the magnetic susceptibility change in heterog
eneous magnetic materials as a function of the magnetic matter charact
eristics (grain size, chemical composition, concentration), and also o
f the sample shape. Techniques for measuring weak susceptibilities are
described. They are used to show the existence of macroscopic demagne
tizing fields in rod specimens beyond a certain volume of magnetic mat
ter.