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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)

谢谢mermaid1128.
据说明书,对于vasp4.4.4后的版本不需要将磁性原子分类。
另外,我也将其磁性原子分类计算过,并相应修改了 POSCAR POTCAR,AFM计算得到磁矩还是和FM设置差不多。是不是INCAR 中的MAGMOM没有读取到,还是别的原因?
8楼2008-09-23 11:51:25
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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
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  32  30   2
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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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