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# Difference between revisions of "M CONSTR"

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For {{TAG|I_CONSTRAINED_M}}=1 the norm of this vector is meaningless since only the direction will be constrained. For {{TAG|I_CONSTRAINED_M}}=2 both the norm as well as the direction of the moments specified by means of {{TAG|M_CONSTR}} are subject to constraints. | For {{TAG|I_CONSTRAINED_M}}=1 the norm of this vector is meaningless since only the direction will be constrained. For {{TAG|I_CONSTRAINED_M}}=2 both the norm as well as the direction of the moments specified by means of {{TAG|M_CONSTR}} are subject to constraints. | ||

− | Setting M_CONSTR= 0 0 0 for | + | Setting |

+ | |||

+ | {{TAG|M_CONSTR}}= ... 0 0 0 ... | ||

+ | |||

+ | for a certain ion is equivalent to imposing no constraints. | ||

For an explanation of the constrained local moments approach see the description of the {{TAG|I_CONSTRAINED_M}} tag. | For an explanation of the constrained local moments approach see the description of the {{TAG|I_CONSTRAINED_M}} tag. |

## Revision as of 17:33, 16 February 2011

M_CONSTR = [real array]

Default: **M_CONSTR** = 3*NIONS*0.0

Description: M_CONSTR specifies the desired local magnetic moment (size and/or direction) for the constrained local moments approach.

The M_CONSTR tag specified the desired size and/or direction of the integrated local moments in cartesian coordinates (3 coordinates must be specified for each ion).

For I_CONSTRAINED_M=1 the norm of this vector is meaningless since only the direction will be constrained. For I_CONSTRAINED_M=2 both the norm as well as the direction of the moments specified by means of M_CONSTR are subject to constraints.

Setting

M_CONSTR= ... 0 0 0 ...

for a certain ion is equivalent to imposing no constraints.

For an explanation of the constrained local moments approach see the description of the I_CONSTRAINED_M tag.

## Related Tags and Sections

I_CONSTRAINED_M, LAMBDA, RWIGS, LNONCOLLINEAR