La prefers to occupy a substitutional site and Laclass="glyphImg imgLazyJSB">Fe anti-bonding states build up.
Fe moves far away from La, and relaxations are greater than other alloying elements.
A strong repulsive interaction builds up between La and C/N atoms.
Interaction of Laclass="glyphImg imgLazyJSB">C/N is markedly greater than other foreign substitutional atoms.
Increase of C/Nclass="glyphImg imgLazyJSB">Fe bond population caused by La is beneficial to material’s strength.