Semi-Heusler-type intermetallics MPtSn (M=Ti, Zr, Hf, Th): a magnetic susceptibility and NMR study

It is shown that an application of nuclear magnetic resonance (NMR) of 47Ti, 49Ti and 91Zr quadrupolar nuclei is extremely useful in controlling the microscopic structure of semi-Heusler-type intermetallics, e.g. structural order/disorder at local sites. No valuable information on structural order/disorder in MPtSn compounds can, however, be directly obtained from static NMR spectra of spin 1/2 117Sn, 119Sn and 195Pt nuclei since the observed spectra are broadened far beyond the rigid-lattice dipolar width due to indirect spin couplings of these heavy nuclei through the chemical bond.