[Wien] Total energy

[ben abdallah houda]

Dear Wien2k Users
 
My question is how to calculate total energy of solid? because i want to calculate the total energy difference between antiferromagnetic and ferromagnetic state. 
This total energy is it obtained from optimization of structure (total energy as a function of te cell volume)?
 If this is the case, how can i choose a serial of volumes? are there arbitrary?
Can you please help me to solve this problem ?
 
Thanks a lot.
 
H.Ben Abdallah
PHD. Departement of physicis, Faculty of Science.
Tunis. TUNISIA
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