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matxiong

木虫 (正式写手)

[交流] [求助]反铁磁计算问题请教!

我做一个铁磁计算

INCAR:
FM设置
ISPIN=2
MAGMOM=16*1 30*1 1*1 1*1

AFM设置
ISPIN=2
MAGMOM=16*1 30*1 1*1 1*-1

其中磁性原子被标记了正负号,其他原子没有标记正负号

可是AFM设置算出来的磁矩和FM设置相同

请问哪里有错误?

我的可能没有磁性超晶胞设置,因为两个铁磁原子位置没有对称性相连。有人做过类似计算没有?

[ Last edited by wuli8 on 2009-6-21 at 22:30 ]
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matxiong

木虫 (正式写手)

和上面POSCAR 对应的INCAR如下:
ENCUT=380
#ISTART=0
ISMEAR=-5
SIGMA=0.2
#IBRION=2
#NSW=100
#POTIM=0.2
#ISIF=3
#EDIFF=1E-5
#EDIFFG=-0.01
GGA=91
VOSKOWN=1
#PREC=High
LREAR=.TRUE.
ISPIN=2
MAGMOM=62*1 4 -4
NEDOS=1000
ICHARG=11
LORBIT=10
5楼2008-09-23 11:13:52
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mermaid1128

木虫 (著名写手)

把POSCAR贴出来看看

把POSCAR贴出来看看
2楼2008-09-23 10:29:31
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matxiong

木虫 (正式写手)

10.7762194459285900    0.0000000000000000    0.0000000000000000
     0.0000000000000000   10.7762194459285900    0.0000000000000000
     0.0000000000000000    0.0000000000000000   10.7880087759617600
  32  30   2
Direct
  0.0179325853440254  0.0179325853440254  0.0144807092926401
  0.0179443923892418  0.0179443923892418  0.5144943146806579
  0.0009437236037932  0.4964960663016043 -0.0012297861080878
  0.0009422689305298  0.4964956809586626  0.4987684032741092
  0.4964960663016043  0.0009437236037932 -0.0012297861080878
  0.4964956809586626  0.0009422689305298  0.4987684032741092
  0.4979171405189111  0.4979171405189111  0.0004894105905524
  0.4979197557551628  0.4979197557551628  0.5004902294080691
  0.0179325853440254  0.2320674146559745  0.2355192907073600
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  0.4964960663016043  0.2490562763962068  0.2512297861080878
  0.4964956809586626  0.2490577310694703  0.7512315967258905
  0.4979171405189111  0.7520828594810895  0.2495105894094476
  0.4979197557551628  0.7520802442448373  0.7495097705919310
  0.2320674146559745  0.0179325853440254  0.2355192907073600
  0.2320556076107582  0.0179443923892418  0.7355056853193421
  0.2490562763962068  0.4964960663016043  0.2512297861080878
  0.2490577310694703  0.4964956809586626  0.7512315967258905
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  0.7535043190413377  0.0009422689305298  0.7512315967258905
  0.7520828594810895  0.4979171405189111  0.2495105894094476
  0.7520802442448373  0.4979197557551628  0.7495097705919310
  0.2320674146559745  0.2320674146559746  0.0144807092926401
  0.2320556076107582  0.2320556076107582  0.5144943146806579
  0.2490562763962068  0.7535039336983957 -0.0012297861080878
  0.2490577310694703  0.7535043190413377  0.4987684032741092
  0.7535039336983957  0.2490562763962068 -0.0012297861080878
  0.7535043190413377  0.2490577310694703  0.4987684032741092
  0.7520828594810895  0.7520828594810895  0.0004894105905524
  0.7520802442448373  0.7520802442448373  0.5004902294080691
  0.1250000000000000  0.6250000000000000  0.1250000000000000
  0.1250000000000000  0.6250000000000000  0.6250000000000000
  0.6250000000000000  0.1250000000000000  0.1250000000000000
  0.6250000000000000  0.1250000000000000  0.6250000000000000
  0.6250000000000000  0.6250000000000000  0.1250000000000000
  0.6250000000000000  0.6250000000000000  0.6250000000000000
  0.3705845954778504  0.3705845954778504  0.1233039916326623
  0.3705857583589943  0.3705857583589943  0.6233024059111214
3楼2008-09-23 10:56:49
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matxiong

木虫 (正式写手)

呵呵,搞错了,上面的POSCAR和INCAR不对应,但都是后面2个原子考虑磁性相反
4楼2008-09-23 11:00:38
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