[Wien] paramagnetic or diamagnetic

[Fecher, Gerhard]

What distinguishes a paramagnetic from a diamagnetic material ?
a) at zero magnetic field the induced magnetic moment is zero for both
b) at external magnetic field the induced magnetiuc moment is parallel / antiparallel to the applied field.
c) both is true
d) none is true

There was already a discussion about paramagnetism, see 
https://www.mail-archive.com/wien@zeus.theochem.tuwien.ac.at/msg15029.html

Ciao
Gerhard

DEEP THOUGHT in D. Adams; Hitchhikers Guide to the Galaxy:
"I think the problem, to be quite honest with you,
is that you have never actually known what the question is."

====================================
Dr. Gerhard H. Fecher
Institut of Inorganic and Analytical Chemistry
Johannes Gutenberg - University
55099 Mainz
and
Max Planck Institute for Chemical Physics of Solids
01187 Dresden
________________________________________
Von: Wien [wien-bounces at zeus.theochem.tuwien.ac.at] im Auftrag von karima Physique [physique.karima at gmail.com]
Gesendet: Samstag, 6. Mai 2017 01:50
An: A Mailing list for WIEN2k users
Betreff: [Wien] paramagnetic or diamagnetic

Dear Wien2k users:

How I can know if the material is paramagnetic or diamagnetic with a calculation.?