<div dir="ltr"><div><div>Hi,<br><br></div>I have been seeking an optimized cell for my system lately. But I'm not entirely sure whether my calculation goes right or not. I have used crystal_sg to describe the atoms position. However, as it is known, my output file shows me only de cell parameters and atomic positions and crystal "units". My crystal is a "ferrite", whose symmetry is 227, which should correpond to fcc. Why don't I have a fcc as my output on scf calculations, for instace?<br></div><div><br></div><div>When do I know that my vc-relax calculation is right? I'm sending my input file (on vc-relax) for any mistakes, in any case.</div><div><br></div><div>Best Regards.</div><div><br></div><div><br></div><div>Input file:</div><div><br></div><div> &CONTROL<br> calculation = 'vc-relax' ,<br> restart_mode = 'from_scratch' ,<br> outdir = '/home/drumsris/Bulk-227/' ,<br> pseudo_dir = '/home/drumsris/Bulk-227/' ,<br> prefix = 'pwscf' ,<br> tstress = .true. ,<br> tprnfor = .true. ,<br> lorbm = .false.,<br> wf_collect = .false.,<br> nstep = 20 ,<br> /<br> &SYSTEM<br> ibrav = 2,<br> celldm(1) = 15.8370388,<br> space_group = 227,<br> nat = 3,<br> ntyp = 3,<br> ecutwfc = 71 ,<br> ecutrho = 564 ,<br> nosym = .true. ,<br> input_dft = 'pbe' ,<br> occupations = 'smearing' ,<br> degauss = 0.0002 ,<br> smearing = 'methfessel-paxton' ,<br> nspin = 2 ,<br> starting_magnetization(1) = -1,<br> starting_magnetization(2) = 1,<br> starting_magnetization(3) = 0,<br> !tot_magnetization = -1,<br> /<br> &ELECTRONS<br> electron_maxstep = 100,<br> diagonalization = 'david' ,<br> diago_thr_init = 1.0e-5 ,<br> conv_thr = 1.D-5 ,<br> mixing_beta = 0.7,<br> mixing_mode = 'plain'<br> /<br> &IONS<br> ion_dynamics = 'bfgs' ,<br> pot_extrapolation = 'atomic' ,<br> upscale = 10D0 ,<br> bfgs_ndim = 1 ,<br> trust_radius_max = 0.8D0 ,<br> trust_radius_min = 1.D-3 ,<br> trust_radius_ini = 0.5D0 ,<br> w_1 = 0.01D0 ,<br> w_2 = 0.5D0 ,<br> /<br> &CELL<br> cell_dynamics = 'bfgs' ,<br> press = 0.D0 ,<br> cell_factor = 2.0 ,<br> press_conv_thr = 0.5D0 ,<br> cell_dofree = 'z' , <br>/<br>ATOMIC_SPECIES<br> Ni 58.69000 Ni.pbe-n-kjpaw_psl.1.0.0.UPF <br> Fe 55.85000 Fe.pbe-spn-kjpaw_psl.1.0.0.UPF <br> O 16.00000 O.pbe-n-kjpaw_psl.1.0.0.UPF <br>ATOMIC_POSITIONS crystal_sg<br>Fe 16d 0.62500 0.62500 0.62500 0 0 0<br>Ni 8a 0.00000 0.00000 0.00000 0 0 0<br>O 32e 0.37980 0.37980 0.37980 <br>K_POINTS {automatic}<br> 5 5 5 0 0 0<br></div><div><div><div><br>-- <br><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div><div>Ricardo Afonso<br></div>Student of Magnetism and Superconductivity Group<br></div><div>Federal University of Sao Carlos<br></div></div></div></div></div></div>
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