<div dir="ltr"><div><div><div><div><div><div><div><div><div><div><div><div><br clear="all"></div>Thank you Mr Delamora for your reply<br><br></div>First, we can create the structure of Cr with 2 ways:<br><br></div>1- with one atom and bcc lattice (0,0,0) or<br></div>2- with two atoms and P lattice (0,0,0) and (.5,.5,.5)<br><br></div>But the second way allows us to do the antiferromagnetic calculation by flipping the spins of one atom.<br><br></div>Sceond, the same thing, normally, for the Ni element.<br><br></div>We can prodce the structure with 2 ways:<br><br></div>1- with one atom and fcc lattice (0,0,0) or<br><br></div>2- with four atoms and P lattice (0,0,0) (1/2,1/2,0) <span style="color:red;font-size:x-large"><span style="color:black;font-size:large"><span style="font-size:small">(0,1/2,1/2) (1/2,0,1/2)<br></span></span></span></div><span style="color:red;font-size:x-large"><span style="color:black;font-size:large"><span style="font-size:small">Here we can flip the spins of the two atoms of Ni to do the antiferromagnetic calculation.<br></span></span></span></div><span style="color:red;font-size:x-large"><span style="color:black;font-size:large"><span style="font-size:small">Third, i want to do the same thing with the NaCl structure (NiO) . I have to get two atoms of Ni at least to reproduce te same crystal structure. And starting with this structure i will determine the equilibrium parameters.<br></span></span></span></div><span style="color:red;font-size:x-large"><span style="color:black;font-size:large"><span style="font-size:small">the question still how to reproduce the NaCl structure with two or four atoms of Ni so we can do antiferromagnetic calculation with this structure.<br></span></span></span><div><div><div><span style="color:red;font-size:x-large"><span style="color:black;font-size:large"><span style="font-size:small"><br><br></span></span></span><div><div><br><div><div><div><div><div><div><div><div>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div style="font-family:monospace"><div><font><span style="color:rgb(0,0,255)">Mr: A.Reggad</span> <br><br><span style="background-color:rgb(238,238,238)"><span style="color:blue">Laboratoire de Génie Physique</span></span><br></font></div><font><span style="color:rgb(0,0,255)">Université Ibn Khaldoun - Tiaret</span><br></font></div><div><font><span style="font-family:monospace"><span style="color:rgb(0,0,255)">Algerie</span></span></font><br></div><div><div><br><span style="font-family:times new roman,serif"><span style="color:blue"></span></span><br></div></div></div></div></div></div></div></div></div></div></div></div></div></div>
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