In terms of ,
the experimental raw asymmetry for TF-SR
analysis of the vortex state in an isotropic type-II superconductor
can be modelled assuming that the contribution to *A*(*t*) from a particular
point in the flux lattice is

where I have combined Eqs. (3.9), (3.27) and (3.31). Eq. (3.35) applies to an ideal flux lattice. To account for smearing of the field distribution due to flux-lattice disorder and nuclear dipolar fields, Eq. (3.35) must be convoluted with a gaussian distribution in the form of Eq. (3.34):

Assuming that the flux-line lattice is composed of equilateral triangles as depicted in Fig. 3.1(a), an arbitrary reciprocal-lattice vector can be written in terms of the real lattice vectors and so that

where

(38) |

is the distance between adjacent vortices. Combining Eqs. (3.36) and (3.37) gives

where is a vector in real space and the sum over

2001-09-28