Graphical programming for pulse automated NMR experiments

We describe a software program designed to control a broadband pulse nuclea r magnetic resonance (NMR) spectrometer used in zero-field NMR studies of m agnetic metals. The software is written in the graphical language Labview. This type of programming allows modifications and the inclusion of new rout ines to be carried out easily by the non-specialist, without changing the b asic structure of the program. The program corrects for differences in the gain of the two acquisition channels (U (phase) and V (quadrature)), and au tomatic baseline subtraction. We present examples of measurements of NMR sp ectra, spin-echo decay (T-2), and quadrupolar oscillations, performed in ma gnetic intermetallic compounds.