<DIV>
<DIV><FONT size=3>Dear Wien users:<BR> I am running wien version wien2k 08_03 on a machine of type Xeon with operating system suse linux, fortran compiler ifort 10.1.021 and math libraries mkl 10.0.2.018.</FONT></DIV>
<DIV><FONT size=3> I have been trying to simulate hcp Tb for weeks, no matter whatever I did (including change the parameters and use different method such as GGA+U or SO), <FONT color=#ff0066><STRONG>I still couldn't get the right magnetic moment of Tb atom, and the convergence criterion was met.</STRONG></FONT> The experimental magnetic moment of Tb is around 10 uB, but the largest magnetic moment I got by wien2k_08.3 was around 7.6 uB (GGA+U+SO).</FONT></DIV>
<DIV><FONT size=3> My computational details are as follows:</FONT></DIV>
<DIV><FONT size=3> here are all the import input files are prepared before runsp_lapw:</FONT></DIV>
<DIV><FONT size=3> <FONT color=#0000ff><STRONG>case.struct</STRONG></FONT></FONT></DIV>
<DIV><FONT color=#000000 size=3>*************************************************************</FONT></DIV>
<DIV><FONT color=#0000ff size=3><FONT color=#000000 size=2>HCP_Tb<BR>H LATTICE,NONEQUIV.ATOMS: 1 194 P63/mmc<BR>MODE OF CALC=RELA unit=bohr<BR> 6.803402 6.803402 10.767485 90.000000 90.000000120.000000<BR>ATOM -1: X=0.33333333 Y=0.66666667 Z=0.75000000<BR> MULT= 2 ISPLIT= 4<BR> -1: X=0.66666667 Y=0.33333333 Z=0.25000000<BR>Tb1 NPT= 781 R0=0.00010000 RMT= 2.50000 Z: 65.0<BR>LOCAL ROT MATRIX: 1.0000000 0.0000000 0.0000000<BR> 0.0000000 1.0000000 0.0000000<BR> 0.0000000 0.0000000 1.0000000<BR> 24 NUMBER OF SYMMETRY OPERATIONS</FONT><BR><FONT color=#000000>*************************************************************</FONT></FONT></DIV>
<DIV><FONT size=3> <FONT color=#0000ff><STRONG>case.in1</STRONG></FONT></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>WFFIL (WFPRI, SUPWF)<BR> 7.00 12 4 (R-MT*K-MAX; MAX L IN WF, V-NMT<BR> 0.30 6 0 (GLOBAL E-PARAMETER WITH n OTHER CHOICES, global APW/LAPW)<BR> 0 0.30 0.000 CONT 1<BR> 0 -3.53 0.005 STOP 1<BR> 1 -1.70 0.010 CONT 1<BR> 1 0.30 0.000 CONT 1<BR> 3 0.30 0.010 CONT 1<BR> 2 0.30 0.010 CONT 1<BR>K-VECTORS FROM UNIT:4 -15.0 5.0 48 emin/emax/nband</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <FONT color=#0000ff><STRONG>case.in2</STRONG></FONT></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=2>TOT (TOT,FOR,QTL,EFG,FERMI)<BR> -9.0 38.0 0.50 0.05 EMIN, NE, ESEPERMIN, ESEPER0<BR>TETRA 0.000 (GAUSS,ROOT,TEMP,TETRA,ALL eval)<BR> 0 0 2 0 3 3 4 0 5 3 6 0 6 6<BR> 12.00 GMAX<BR>NOFILE FILE/NOFILE write recprlist</FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <STRONG><FONT color=#0000ff>case.inm</FONT></STRONG></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>MSEC1 0.0 YES (BROYD/PRATT, extra charge (+1 for additional e), norm)<BR>0.02 mixing FACTOR for BROYD/PRATT scheme<BR>1.00 1.00 PW and CLM-scaling factors<BR>9999 8 idum, HISTORY</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <STRONG><FONT color=#0000ff>case.inst</FONT></STRONG></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>Tb<BR>Xe 4<BR>4, 3,3.0 N<BR>4, 3,1.0 N<BR>4,-4,4.0 N<BR>4,-4,0.0 N<BR>5, 2,1.0 N<BR>5, 2,0.0 N<BR>6,-1,1.0 N<BR>6,-1,1.0 N<BR>****<BR>**** END of input (instgen_lapw)</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <STRONG><FONT color=#0000ff>case.indm</FONT></STRONG></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>-15. Emin cutoff energy<BR> 1 number of atoms for which density matrix is calculated<BR> 1 1 3 index of 1st atom, number of L's, L1<BR> 0 0 r-index, (l,s)index</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <FONT color=#0000ff><STRONG>case.indmc</STRONG></FONT></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>-15. Emin cutoff energy<BR> 1 number of atoms for which density matrix is calculated<BR> 1 1 3 index of 1st atom, number of L's, L1<BR> 0 0 r-index, (l,s)index</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <FONT color=#0000ff><STRONG>case.inorb <FONT color=#cc0099>(here, the value of u varies from 0.0 to 0.7 Ry)</FONT></STRONG></FONT></FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV> 1 1 0 nmod, natorb, ipr<BR>PRATT 1.0 BROYD/PRATT, mixing<BR> 1 1 3 iatom nlorb, lorb<BR> 1 nsic 0..AFM, 1..SIC, 2..HFM<BR> 0.10 0.00 U J (Ry) Note: we recommend to use U_eff = U-J and J=0</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=3> <STRONG><FONT color=#0000ff>case.inso</FONT></STRONG></FONT></DIV>
<DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV>WFFIL<BR> 4 1 0 llmax,ipr,kpot<BR> -15.0000 5.0000 emin,emax (output energy window)<BR> 0. 0. 1. direction of magnetization (lattice vectors)<BR> 1 number of atoms for which RLO is added<BR> 1 -1.7 0.01 atom number,e-lo,de (case.in1), repeat NX times<BR> 0 0 0 0 0 number of atoms for which SO is switch off; atoms</DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV></DIV>
<DIV><FONT size=3>other parameters: RMT = 2.5, Kpoints: 1000, IBZ: 76</FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT color=#ff0066 size=3><STRONG></STRONG></FONT> </DIV>
<DIV><FONT color=#ff0066 size=3><STRONG>Result: </STRONG></FONT></DIV>
<DIV><STRONG><FONT color=#009933 size=3>by GGA+U:</FONT></STRONG></DIV>
<DIV><FONT color=#0000cc size=3>command line: runsp -ec 0.0001 -cc 0.0001 -orb -i 1000</FONT></DIV>
<DIV> U(Ry) E(Ry/cell) M(uB/atom)<BR> 0.0 -46876.362489 5.86499<BR> 0.1 -46876.362491 5.86434 ( whe Ueff = 0.1 Ry, using -orb doesn't converge, so i use -orbc)<BR> 0.2 -46876.263915 6.20827<BR> 0.3 -46876.270606 6.25566<BR> 0.4 -46876.260620 6.26501<BR> 0.5 -46876.232366 6.26697<BR> 0.6 -46876.243298 6.27250<BR> 0.7 -46876.216162 6.27217</DIV>
<DIV> </DIV>
<DIV><FONT color=#009933 size=3><STRONG>by GGA+U+SO</STRONG> <FONT color=#cc0099>(based on the result of GGA+U, and rm *.broy*)</FONT></FONT><BR><FONT color=#0000cc size=3>command line: runsp -ec 0.0001 -cc 0.0001 -orb -so -i 1000</FONT></DIV>
<DIV>U(Ry) E(Ry/cell) M_spin(uB/atom) M_orbit(uB/atom)<BR>0.0 -46876.609319 5.81268 1.25824<BR>0.1 -46876.335016 6.04722 0.00000 (GGA+U+SO doesn't converge, i don't know why ?)<BR>0.2 -46876.507404 6.19715 1.40041<BR>0.3 -46876.498692 6.23715 0.01548<BR>0.4 -46876.487014 6.25003 0.00605<BR>0.5 -46876.470927 6.25129 1.33299<BR>0.6 -46876.467519 6.26165 0.00113<BR>0.7 -46876.452793 6.25998 1.36656</DIV>
<DIV> </DIV>
<DIV> <FONT color=#ff0000 size=4><STRONG>Two questions:</STRONG></FONT></DIV>
<DIV> <FONT size=3>(1)From the data above, the largest magnetic moment of atom Tb is about 7.6 uB, which is still small than the experimental magnetic moment (10 uB). How can I get the right magnetic moment of Tb?</FONT></DIV>
<DIV><FONT size=3> (2)About GGA+U, it need case.indm or case.indmc ? runsp -orb or runsp -orbc ?</FONT></DIV>
<DIV><FONT size=3> About GGA+U+SO, there are <FONT color=#ff00ff><STRONG>two Tb atoms which are at the unequivalent position</STRONG></FONT>, how to change the case.inso files ?</FONT></DIV>
<DIV><FONT size=3> <STRONG><FONT color=#0000ff>case.inso</FONT></STRONG>
<DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV><FONT size=2>WFFIL<BR> 4 1 0 llmax,ipr,kpot<BR> -15.0000 5.0000 emin,emax (output energy window)<BR> 0. 0. 1. direction of magnetization (lattice vectors)<BR> </FONT><FONT size=2><FONT color=#ff00ff>1 number of atoms for which RLO is added<BR> 1 -1.7 0.01 atom number,e-lo,de (case.in1), repeat NX times </FONT><FONT color=#0000ff>( if i wanna add RLO to the second Tb atom, what should I do ?)<BR></FONT> 0 0 0 0 0 number of atoms for which SO is switch off; atoms</FONT></DIV>
<DIV><FONT size=3>*************************************************************</FONT></DIV>
<DIV> </DIV></DIV></FONT></DIV>
<DIV><FONT size=3> I know havey rare earth elements are hard to deal with , and I really need someone who can give me some enlightenment. Any suggestion will be greatly appreciated.</FONT></DIV><FONT size=3></FONT></DIV>
<DIV><FONT size=3> I am looking forward to your reply.<IMG src="http://mail.cstnet.cn/funcs/images/smile01.gif"></FONT></DIV>
<DIV><FONT size=3> Cheers.</FONT></DIV>
<DIV><FONT size=3></FONT> </DIV>
<DIV><FONT size=3>Yours sincerely</FONT></DIV>
<DIV><FONT size=3>Hui Wang</DIV>
<DIV><BR></DIV></FONT>
<DIV><FONT color=#0000cc size=3></FONT> </DIV>
<DIV><STRONG><FONT color=#009933 size=3></FONT></STRONG> </DIV>
<DIV><FONT size=3></FONT> </DIV><br><!-- sign --><br>=========================================================<br>Magnetism and Magnetic Materials Division<br>Shenyang Materials Science National Laboratory<br>Institute of Metal Research<br>Chinese Academy of Sciences<br>72 Wenhua Road, Shenyang 110016, P. R. China<br>Tel: +86-24-83978845<br>PHD: Wanghui<br>Email: hwang@imr.ac.cn <br>========================================================= <br><!-- urlfiles --><br><br><!-- footer --><br>