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Dynamic nuclear spin polarization (DNP) is mediated by the dipolar interaction of paramagnetic centres with nuclear spins. This process is most likely to occur near paramagnetic centres at an angle close to 45° with respect to the direction of the external magnetic field. The resulting...
The restrictions on the coefficients describing physical effects depend on the orientation of the symmetry elements of the crystal or quasicrystal with respect to the Cartesian coordinate system employed. They are given for the piezoelectric effect of second order in stress or strain for all the...
Algorithms are presented for maximally efficient computation of the crystallographic fast Fourier transform (FFT). The approach is applicable to all 230 space groups and allows reduction of both the computation time and the memory usage by a factor equal to the number of symmetry operators. The...
Automatically generated orientation‐location parts, or coordinate triplets describing the geometric elements, differ frequently from the corresponding parts of the symmetry‐operation symbols listed in International Tables for Crystallography [(1983), Vol. A, Space‐Group Symmetry, edited by Th....
An analytical expression for the characteristic length scale (L) of the pair correlation functions for randomly faulted hexagonal close‐packed structures is derived for the case when the roots of the characteristic equation are all real. The values of L obtained by this analytical treatment are...
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