A Minor Tool
Magneticians sometimes want to plot curves of spontaneous magnetization as a function of temperature for magnetically ordered materials, usually to compare to experimental results from magnetic neutron scattering or magnetometry. These curves are based on the Brillouin function. Their shape depends on the total angular momentum, J or sometimes S. They look something like this:
All this program, found here at http://djg.altervista.org/downloads/Brillouin_curve_calc.tar.gz does is take the J from the user and write out the numbers for the plot. The actually machinery is taken from M I Darby 1967 Br. J. Appl. Phys. 18 1415 doi:10.1088/0508-3443/18/10/307. And it is this paper that should be referenced, or in fact used directly. Comments on g95 for Windows can be found here.
And, yes, I did draw the graph in Excel. Ugly but good enough…