M CONSTR: Difference between revisions
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Description: {{TAG|M_CONSTR}} specifies the desired local magnetic moment (size and/or direction) for the constrained local moments approach. | Description: {{TAG|M_CONSTR}} specifies the desired local magnetic moment (size and/or direction) for the constrained local moments approach. | ||
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The {{TAG|M_CONSTR}} tag | The {{TAG|M_CONSTR}} tag sets the desired size and/or direction of the integrated local magnetic moments in cartesian coordinates. | ||
For each ion 3 coordinates must be specified, i.e., for a system of ''N'' ions | |||
{{TAG|M_CONSTR}}= M_1x M_1y M_1z M_2x M_2y M_2z .... M_Nx M_Ny M_Nz | |||
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 on the integrated local magnetic moment at this ionic site. | |||
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. | ||
== Related | == Related tags and articles == | ||
{{TAG|I_CONSTRAINED_M}}, | {{TAG|I_CONSTRAINED_M}}, | ||
{{TAG|LAMBDA}}, | {{TAG|LAMBDA}}, | ||
{{TAG|RWIGS}}, | {{TAG|RWIGS}}, | ||
{{TAG|LNONCOLLINEAR}} | {{TAG|LNONCOLLINEAR}} | ||
{{sc|M_CONSTR|Examples|Examples that use this tag}} | |||
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[[Category:INCAR]][[Category:Magnetism | [[Category:INCAR tag]][[Category:Magnetism]] | ||
Latest revision as of 14:45, 8 April 2022
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 sets the desired size and/or direction of the integrated local magnetic moments in cartesian coordinates.
For each ion 3 coordinates must be specified, i.e., for a system of N ions
M_CONSTR= M_1x M_1y M_1z M_2x M_2y M_2z .... M_Nx M_Ny M_Nz
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 on the integrated local magnetic moment at this ionic site.
For an explanation of the constrained local moments approach see the description of the I_CONSTRAINED_M tag.
Related tags and articles
I_CONSTRAINED_M, LAMBDA, RWIGS, LNONCOLLINEAR