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! Copyright (C) 2002-2005 J. K. Dewhurst, S. Sharma and C. Ambrosch-Draxl.
! This file is distributed under the terms of the GNU General Public License.
! See the file COPYING for license details.
!BOP
! !ROUTINE: moment
! !INTERFACE:
subroutine moment
! !USES:
use modmain
use modtest
! !DESCRIPTION:
! Computes the muffin-tin, interstitial and total moments by integrating the
! magnetisation.
!
! !REVISION HISTORY:
! Created January 2005 (JKD)
!EOP
!BOC
implicit none
! local variables
integer idm,is,ias
integer nr,nri,ir,i
real(8) t1
! automatic arrays
real(8) fr(nrmtmax)
! external functions
real(8) splint
external splint
if (.not.spinpol) then
mommt(:,:)=0.d0
mommttot(:)=0.d0
momir(:)=0.d0
momtot(:)=0.d0
return
end if
! find the muffin-tin moments
mommttot(:)=0.d0
do idm=1,ndmag
do ias=1,natmtot
is=idxis(ias)
nr=nrmt(is)
nri=nrmti(is)
i=1
do ir=1,nri
fr(ir)=magmt(i,ias,idm)*r2sp(ir,is)
i=i+lmmaxi
end do
do ir=nri+1,nr
fr(ir)=magmt(i,ias,idm)*r2sp(ir,is)
i=i+lmmaxo
end do
t1=splint(nrmt(is),rsp(:,is),fr)
mommt(idm,ias)=fourpi*y00*t1
mommttot(idm)=mommttot(idm)+mommt(idm,ias)
end do
end do
! find the interstitial moments
do idm=1,ndmag
t1=dot_product(magir(:,idm),cfunir(:))
momir(idm)=t1*omega/dble(ngtot)
end do
momtot(:)=mommttot(:)+momir(:)
! total moment magnitude
if (ncmag) then
momtotm=sqrt(momtot(1)**2+momtot(2)**2+momtot(3)**2)
else
momtotm=abs(momtot(1))
end if
! write total moment magnitude to test file
call writetest(450,'total moment magnitude',tol=1.d-3,rv=momtotm)
return
end subroutine
!EOC
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